Send the prerecorded video through a live encoder rather than uploading it as an ordinary YouTube video. In OBS Studio, add the file as a Media Source, enable Loop, and connect OBS to the stream URL and stream key shown in YouTube Live Control Room.
That setting tells OBS to play the file again when it finishes, but it does not guarantee a seamless boundary. A brief pause, black frame, or audio discontinuity can depend on the actual file, the scene, the encoder and the viewer playback path, so test the complete setup before relying on it overnight.
What creates the repeated live feed
YouTube Live receives a continuous feed from an encoder. It does not repeatedly fetch and replay a local video file for you. The encoder reads the file, places its picture and sound into the live output, and sends that output to YouTube while the broadcast is active.
For a local setup, OBS Studio can perform this job. You create a scene, place a Media Source in it, select the video, and send the scene to YouTube. When the source reaches the end of the file, the Loop property tells OBS to start the file again. The repeated programme is therefore created before it reaches YouTube.
This distinction matters when you are diagnosing a boundary problem. If the picture turns black as one copy ends and the next begins, the first place to inspect is the OBS source and scene. If OBS continues showing the expected picture but viewers see a pause, inspect the encoder output, network path and YouTube playback path instead.
A looping live feed is not the same as a playlist assembled by YouTube. You are sending one ongoing broadcast, with the file replayed inside that broadcast. That can be useful for a devotional visual, an ambience track, a study timer or an event replay, but it also means that the file’s ending and beginning meet directly.
Before changing settings, watch the file outside OBS from its final seconds through its first seconds. Note whether the last frame is intentional, whether the audio ends sharply, and whether the opening frame is black. If the source itself contains a fade, silence or black frame, OBS will reproduce that content rather than remove it.
For a longer channel, the playback computer becomes part of the operating plan. A power cut, system update, sleep setting or network interruption can stop the broadcast even if the video is correctly configured. If the channel must continue after local power loss, the practical concern is broader than the loop checkbox. You may also want to read how to keep a 24/7 livestream running after a power outage before choosing where the encoder will run.
Add the video as an OBS Media Source
Open OBS Studio and create or select the scene that should appear on YouTube. Keep the first test simple: one Media Source, with the intended video, and no transition between scenes. A simple scene makes it easier to tell whether a black frame comes from the file or from an extra source changing state.
In the Sources panel, add a Media Source. Give it a recognisable name, such as main-loop, then choose the local video file. OBS documents Media Source support for Windows, macOS and Linux, along with common containers including MP4, TS, MOV, MKV, AVI and WebM. The OBS Project Media Sources documentation is the right reference if the labels in your installed version differ.
Select the file rather than relying on a path that may later change. If the file is stored on an external drive, confirm that the drive remains available when the stream starts. A source that worked during setup can still fail later if the drive is disconnected, mounted under a different path or made unavailable by the operating system.
Check the source’s size and position in the preview. If the video is smaller than the canvas, OBS may show unused space around it. That is different from a black frame at the loop boundary, but it can make the source look faulty. Use the source transform controls to fit the file to the scene when that is the intended presentation.
Play the source in the OBS preview before connecting YouTube. Let it run long enough to reach the end. Watch both the picture and the audio. Do not use only the first few seconds as evidence that the source is ready, because the relevant behaviour occurs when playback completes.
If the file has several audio tracks, unusual timing, subtitles or a variable presentation, keep those characteristics in mind during testing. Do not assume that changing an unrelated export setting will solve a problem you have not reproduced. First establish whether the issue exists in the file, in OBS, or only after the feed reaches YouTube.
Enable Loop, and understand what it does
Open the Media Source properties and enable Loop. OBS describes this property as: “Specifies whether the file play again once playback has completed.” The wording is about repetition. It is not a promise that the final decoded frame will connect to the first decoded frame without a visible or audible change.
Also review Show nothing when playback ends. That setting can hide the source when playback reaches its end. If Loop is disabled, or if the source does not restart as expected, this option can leave the scene showing no media. Confirm that Loop is enabled and that the expected source remains visible during a complete repeat.
For the first test, avoid adding a second copy of the same file to the scene. Two sources can make it unclear which one is visible or audible. They can also create an apparent flash if one source ends while another becomes active. One source in one scene gives you a clean baseline.
Once Loop is enabled, start the source and wait for the boundary. Do not drag the playhead and call that a successful test. A real run allows the decoder to reach the end naturally, which is the event that matters in a live broadcast.
Listen with headphones as well as watching the preview. A loop can look continuous while producing a click, a short silence or a change in loudness. Conversely, a deliberate audio fade may be acceptable even when the picture changes slightly. Decide what your viewers should experience before you decide whether a result is good enough.
If your content is a short chant, a continuous background animation or a local news loop, you may need several boundary checks rather than one. The first repeat can behave differently from a later one if the computer is under load or if other software begins working in the background. This is a verification step, not a guarantee of a gap-free result.
Connect OBS to YouTube Live
In YouTube Studio, create or select the live stream in Live Control Room and choose the encoder workflow. YouTube provides a stream URL and a stream key for the encoder. Enter those values in OBS’s streaming settings, following the current instructions in YouTube’s live-stream settings documentation.
Treat the stream key as a credential. It is the information that permits the encoder to send a feed that YouTube can accept, so do not publish it in a screenshot, paste it into a public document or leave it in a tutorial image. If you think it has been exposed, use YouTube’s current controls for replacing or resetting it.
YouTube recommends RTMPS for ingestion. Follow the current encoder guidance for the intended resolution and frame rate rather than copying settings from an unrelated channel. The YouTube encoder settings documentation is the source to check because platform guidance and interface labels can change.
Start with a private or unlisted broadcast if you are testing the boundary. This lets you observe the real YouTube path without presenting an untested loop to subscribers. Check the OBS preview first, then YouTube’s live preview, then the public viewer page if appropriate.
There are two different controls to keep separate. OBS controls whether the local source repeats. YouTube controls the live broadcast and receives the resulting encoder feed. Changing a YouTube setting will not repair a black frame already present in the OBS scene, and enabling Loop in OBS will not correct a network interruption between OBS and YouTube.
If you use a different ingestion method, read its current requirements before treating it as a fix. YouTube documents HLS separately, including requirements around transport stream segments, segment duration and the number of outstanding segments. HLS can involve more latency than continuous RTMP, and it is not documented as a remedy for a loop boundary. Changing protocols without identifying the fault can make the test harder to interpret.
Check the loop transition in your setup
A loop is acceptable only after you have watched the actual setup through the boundary. Check it in this order:
- Play the file directly outside OBS and inspect its final and opening seconds.
- Play it in the OBS scene with Loop enabled.
- Watch the OBS preview as playback repeats.
- Send the scene to a private or unlisted YouTube broadcast.
- Watch the YouTube playback on the device and connection your audience is likely to use.
At each stage, record what changes. A black frame that appears in the local file is a content issue. One that appears only in OBS points towards the source, scene or local playback. One that is absent in OBS but visible on YouTube may relate to encoding, transmission or viewer playback rather than the Loop property itself.
Use the exact file you intend to publish. Do not test with a short sample and then replace it with a longer export without repeating the check. Container, timing, audio layout and the opening and closing frames all belong to the file being tested.
Watch picture and sound together. The boundary can fail in only one of them. Look for a single black frame, a flash to the scene background, a frozen final image, a jump in position, a click, a short silence or a sudden change in volume. Also check whether your scene contains an overlay that disappears when the Media Source restarts.
A viewer’s experience can differ from the OBS preview. YouTube receives an encoded stream, processes it for playback and delivers it through a viewer connection. For that reason, a clean local repeat is encouraging but not proof that every viewer will see the same transition. This is why a private or unlisted end-to-end test is more useful than inspecting only the source properties.
If you are planning a permanent music or devotional channel, keep a small test log. Note the file name, OBS scene, date of the test and what happened at the boundary. You do not need a complicated monitoring system to make this useful. A record prevents you from confusing a successful test of one export with a successful test of a later replacement.
For creators deciding between local control and a managed playback arrangement, compare the actual responsibilities rather than the marketing label. Local OBS gives you direct control over the scene and source, but the computer and its power and network settings remain your responsibility. A cloud-based route can remove the need to keep your own computer playing the file; with StreamNeo, the specific pain removed is leaving your computer running and watching for a dropped broadcast after you have uploaded the video and supplied the YouTube stream key. You should still test the resulting channel and review the provider’s current terms before committing.
Troubleshoot gaps or black frames
Start by classifying the symptom. A visible black frame is not the same as a brief audio gap, and neither is the same as YouTube buffering. Write down where it occurs and whether it repeats at every boundary. A precise description is more useful than changing several settings at once.
If the source disappears
Return to the Media Source properties and confirm that Loop is still enabled. Check Show nothing when playback ends, because hiding the source can make the scene appear empty when playback reaches its endpoint. Confirm that the file path still works and that the source is in the scene currently being sent to YouTube.
If the source was moved, renamed or stored on removable media, restore access to the original path or select the file again. Then run the source through a complete repeat in OBS before reconnecting the live broadcast. A missing file and a boundary glitch can look similar from the viewer’s side, but they need different fixes.
If there is a black frame
Inspect the final and opening frames in the original file first. Some videos intentionally begin with black, and some exports include a black frame at the end. If the black image belongs to the content, the encoder is not inventing it at the boundary.
Next, check the OBS scene for other sources, transitions and visibility changes. Temporarily simplify the scene to the Media Source and a fixed background. If the black frame disappears, add the other elements back one at a time so you can identify which source or transition is involved.
Do not assume that a particular codec, frame rate or export setting is a guaranteed cure. Those choices may affect compatibility and playback, but the available documentation does not establish a universal setting that removes every black frame at a file boundary. Test a new export only when you have a reason connected to the observed symptom, then test the new file from beginning to end.
If there is an audio click or silence
Listen to the end and beginning of the source outside OBS. A hard cut from non-zero audio to silence can create a click, while a deliberate fade can create a short quiet interval. Decide whether the boundary is part of the programme design or an unwanted discontinuity.
Then test the same file in OBS with all unrelated sources muted. If the audio is clean locally but not on YouTube, compare the local and live recordings and check the encoder path. Avoid changing several audio devices, scene sources and stream settings together, because you will lose track of which change affected the result.
If the feed buffers or disconnects
A buffering viewer does not necessarily indicate a loop problem. Check whether OBS remains connected and whether the preview continues through the boundary. If OBS itself is buffering or dropping frames, investigate the local computer and network separately from the media source.
For OBS-specific streaming interruptions, the guide to stopping OBS from buffering while streaming to YouTube may help you separate source playback from transmission. If you are using a different encoder workflow, YouTube’s current encoder documentation should take priority over a generic setting copied from another channel.
If the problem returns overnight
Run a longer private or unlisted test and leave the computer configured as it will be for the real broadcast. Disable sleep if that is appropriate for your machine, prevent automatic updates from interrupting the session where possible, and check that the source drive and network connection remain available.
A local loop also needs an operating plan for recovery. If you use scripts or another encoder rather than OBS, you can review how to make an FFmpeg YouTube stream recover from network errors. If you use OBS, focus first on the built-in source state, the scene being sent, the connection status and the computer’s power settings.
If the channel’s live URL must remain part of a regular schedule, plan the broadcast lifecycle separately from the file loop. The guide to keeping the same live URL for a 24/7 YouTube music stream addresses that different operational question. It does not turn the Loop property into a seamless-transition guarantee.
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FAQ
Does OBS Loop guarantee a gap-free YouTube Live repeat?
No. OBS documents Loop as repeating the file after playback completes, not as guaranteeing a seamless visual or audio transition. Test the exact file, scene, encoder and YouTube playback path before publishing.
Why does my video show a black frame when it restarts?
Check whether the black frame is already in the file’s final or opening frames. Then inspect Show nothing when playback ends, the active scene and any other sources or transitions that may briefly hide the Media Source.
Should I use HLS to remove the loop gap?
There is no documented basis for treating HLS as a cure for a loop boundary. YouTube documents separate HLS constraints and notes higher latency than continuous RTMP, so choose the ingestion method for its documented requirements rather than as an assumed fix.
Can I test the loop without making it public?
Yes. Use a private or unlisted YouTube Live broadcast while checking the end-to-end result. Watch OBS first and then the YouTube playback, because a clean local preview does not prove that every viewer will see an identical transition.