To stream a local video as a YouTube Live loop from a Mac, add it to an OBS Media Source, enable Loop, and send OBS’s feed to an encoder stream in YouTube Studio. Check the incoming picture and sound in Live Control Room before you make the stream public.
OBS repeats the local file; YouTube receives the resulting live feed. It does not repeat your file for you, and OBS looping should not be treated as gapless playback. A preview test helps you catch a wrong scene, silent audio or connection problem before viewers arrive.
What you need on a Mac
You need OBS installed, a local video or audio file that you have permission to stream, a YouTube channel eligible for live streaming, and a dependable internet connection. A monitor and headphones are useful for checking the picture and sound, but this file-based setup does not require a webcam or microphone.
Use OBS’s Media Source when the material is a file on the Mac. OBS documents Media Source as available on macOS and lists common formats including MP4, MOV, MKV and WebM for video, and MP3, AAC, OGG and WAV for audio. Check the current OBS Media Sources documentation if a particular file will not load; a format extension alone does not guarantee that the installed OBS version can decode it.
YouTube says a channel must be verified and must not have had live-streaming restrictions during the preceding 90 days. First-time activation can take time, so enable live streaming well before the planned broadcast rather than discovering an eligibility or activation delay at the start. Confirm the current rules on YouTube’s live streaming tips.
Keep the Mac plugged into power and prevent it from sleeping for the length of the test or broadcast. Closing the lid, power-saving settings, a restart, or a network interruption can stop the encoder feed. A long-running stream therefore depends on more than the Loop checkbox: the computer, OBS, file and connection all need to keep working.
If you are comparing a Mac running OBS with an unattended cloud workflow, decide first whether you need the Mac to remain available and watched. For a separate channel setup question, see this guide to connecting a 24/7 cloud stream to a brand account.
Create or select an encoder stream in YouTube Studio
Open YouTube Studio and choose Create → Go Live. In Live Control Room, use the Stream tab to create an encoder stream or select an existing stream setup. Labels and layout can change, so use YouTube’s current encoder streaming instructions if the menu differs from what you see.
The stream setup provides a server URL and a stream key. OBS acts as the encoder in this workflow: it sends the video and audio feed to YouTube using those connection details. YouTube Studio is where you configure and manage the event, see the incoming preview and decide when to go live. Starting the feed in OBS does not by itself mean that you have completed YouTube’s separate go-live action.
Treat the stream key like a password. Anyone who obtains it may be able to send a feed to your stream. Do not show it in a screen recording or share it in a message. If you think it has been exposed, reset it in Live Control Room and replace the saved value in OBS before streaming again. YouTube explains stream key handling in its stream key guidance.
If you have more than one channel or brand account, check the channel name and event in Studio before copying details. A valid key connected to the wrong channel can produce a preview in an unexpected place. The brand account connection guide covers channel identity separately; in this workflow, the essential check is that the Studio stream you intend to use is the one whose URL and key you put into OBS.
Add a Media Source in OBS
Open OBS and create or select the scene you intend to send. In the Sources area, select +, then choose Media Source. Give the source a recognisable name such as “Main loop” so it is easy to identify later, then choose Create New and confirm.
In the Media Source properties, enable Local File if it is not already selected, use Browse to select the file on your Mac, and confirm the selection. The OBS canvas should show the file once it begins playback. If the source is audio-only, the canvas may remain blank; use the OBS audio meter and the preview test to confirm that sound is present.
A local Media Source is the direct choice for one file. If you need a playlist of files, OBS’s VLC Video source can be more suitable, but it requires VLC to be installed and configured. Do not choose a more involved source just because the word “loop” appears in a guide: the relevant distinction is one local file versus a playlist. For a playlist-oriented YouTube approach, see how to loop a playlist continuously in India.
Use screen capture only when you need to show another application or the Mac’s display, not simply to play a file. A Media Source avoids window borders, notifications and changes in the desktop becoming part of the broadcast. OBS documents that its Mac Screen Capture source has different audio availability across macOS releases: audio capture is documented for macOS 13 and later, while macOS 12.3–12.6 is listed without audio. The source documentation dates from 2023, so check current OBS and macOS guidance and test the actual sound path if you choose display capture.
Check that the chosen scene is active and the Media Source is visible in the Sources list. If the canvas is black, open the source properties and verify the selected file, then check whether the file plays locally. A missing or moved file needs to be selected again; reconnecting YouTube will not fix a source that OBS cannot read.
Enable Loop for the local file
Open the Media Source properties again and tick Loop. OBS describes this control as restarting the file after playback has completed. Leave Restart playback when source becomes active enabled if you want the file to start from its beginning when the source is activated; the exact behaviour you need depends on how you switch scenes during production.
Then confirm the file plays and reaches its end. Loop means OBS starts the file again after it completes. It does not promise a gapless join: you may see or hear a short transition at the boundary, depending on the media and playback. Do not describe the stream as seamless unless you have tested the actual file and can accept what happens between repetitions.
For a devotional channel, for example, make a test with the same bhajan recording and artwork you plan to use. Listen near the end of the track as well as at the restart. A loop can appear correct in a static OBS canvas while the audio is too quiet, clipped, or interrupted at the boundary. Check that the material itself is suitable to repeat and that you have the rights to stream it.
OBS is only repeating what you provide; YouTube is not turning a single upload into a repeating local playlist. That distinction matters if you plan to change the content later. Replace or edit the source in OBS, then preview the new feed rather than assuming Studio will pick up a revised file on its own.
Enter YouTube’s server URL and stream key in OBS
In OBS, open Settings → Stream. Select the YouTube service if available, then enter the server URL and stream key from the matching Live Control Room stream. Depending on the OBS version and service selection, you may be offered a server choice or fields for a custom server and key. Use the values YouTube provides for this stream rather than copying details from an old setup.
YouTube recommends RTMPS for an encrypted encoder connection. If Studio provides an RTMPS server address, use the supplied address and confirm that it is entered accurately. Do not change unrelated encoding settings merely to make the fields look familiar. Click Apply and OK, then recheck that the correct scene and media file are ready before connecting.
Choose a resolution, frame rate and bitrate that your Mac can encode reliably and that your upload connection can sustain. Higher settings require more capacity and bandwidth; they do not repair a weak connection. YouTube recommends leaving 20% upload bandwidth available beyond the total stream bitrate. If you are running primary and backup feeds, account for both bitrates before leaving that headroom. This is a recommendation from YouTube, not a guarantee that a connection will remain stable.
Use a wired connection if practical, especially for an unattended or long test. On shared Wi-Fi, other devices can use the upload capacity you expected OBS to have. If the connection is unstable, reduce the demand or resolve the network issue before increasing quality settings. The live streaming checklist is useful for checking the broader preparation around the encoder and channel.
Before starting, check OBS’s audio mixer. A file with embedded sound should move the relevant meter during playback. If the source is intended to be silent, confirm that this is deliberate. Monitoring through headphones can reveal problems that a moving meter cannot, including an unexpected soundtrack or distorted audio.
Start the feed and check Live Control Room preview
Start the stream in OBS using Start Streaming. This begins sending the encoder feed to YouTube; it does not necessarily publish the event to viewers. Return to Live Control Room and wait for the incoming signal and preview. The first image may take a little while to appear, so check the interface rather than repeatedly changing settings while the connection is negotiating.
When the preview appears, confirm the right scene, framing, motion and audio. A representative test should include the actual file, the intended volume and enough playback to hear the loop boundary. Review YouTube’s stream health messages. If Studio indicates a problem, resolve that before selecting the separate Go Live action or making an event public.
For an initial rehearsal, use an unlisted event or another controlled audience setting where appropriate. Check the stream from a second device or a mobile connection if viewers will commonly watch that way. YouTube recommends preparing encoders ahead of the event and checking stream accessibility; a preview on the same Mac is not a substitute for confirming what a viewer receives.
Once the feed and event details look right, follow the Live Control Room prompt to go live. Keep OBS running and monitor both the picture and sound during the broadcast. A preview confirms that a feed reached Studio at that moment; it does not guarantee that the Mac, OBS or network will stay connected overnight.
For a long loop, run a meaningful test using the same power, connection, scene and media source you will use in production. Note what happens when the Mac display sleeps, whether the loop restarts as expected, and whether the stream health changes when the network is busy. YouTube says streams under 12 hours are automatically archived when ended; that refers to archiving, not a promise of continuous operation. Check YouTube’s current guidance before relying on an archive or a long broadcast.
Troubleshoot a missing or incorrect preview
If Studio does not show a preview, check the failure in order rather than changing several settings at once. Confirm that OBS says it is streaming, the correct YouTube stream is open in Live Control Room, and the server URL and key belong to that stream. A stale key, a typo, or details from another channel can prevent the feed from arriving where you expect.
If OBS is connected but the preview is black, check the active scene and source visibility. Open Media Source properties and confirm the file path still exists and the file plays. Audio-only material will not produce a picture, and a video may start with a black frame; wait long enough to see whether content appears before concluding that the source is broken.
If the preview has picture but no sound, inspect the OBS mixer while the file is playing. Confirm that the source is not muted and that the file actually contains audio. If you are capturing another Mac application rather than using Media Source, verify the macOS and OBS audio capture configuration; the screen capture path is not the same as a file source.
If the preview stutters or Studio reports stream health trouble, lower the encoder load or bitrate and test again. Check the Mac’s CPU use, close demanding applications, and see whether another device is consuming upload bandwidth. YouTube’s 20% headroom recommendation is a starting point for planning, not a diagnosis: the available upload rate can vary over time, particularly on shared or wireless connections.
If the preview is the wrong content, stop and correct the scene before going live. Confirm the channel and event name in Studio, the active scene in OBS, and the visible source order. A test from a second device can also catch an event that is public when you intended a controlled rehearsal.
For a stream that disconnects after working, check power and sleep settings, network stability, and OBS’s current status before restarting. If the stream key may have been exposed, reset it in Studio and update OBS. Restarting can restore a feed, but it does not explain why it dropped, so test the cause before depending on the setup for a longer run.
Decide whether OBS fits the way you will run the channel
OBS on a Mac gives you control over the scene and file and is useful when you want to make changes during a broadcast. In exchange, the Mac must stay powered, awake, connected and running OBS. That is a practical distinction for a channel meant to run through the night: a setup that works during an afternoon test still needs a plan for monitoring and recovery.
A local-file workflow is also different from a cloud-based one, where the computer does not need to stay switched on. StreamNeo turns an uploaded file into a YouTube live feed, so you do not need to leave the Mac running OBS simply to keep that file on air; it is YouTube-only. Choose based on whether you need OBS’s local scene control or want to avoid keeping a computer running, and still check your content, channel and stream before relying on either workflow.
Repetition alone does not establish whether a channel or broadcast qualifies for monetisation. YouTube’s policies address repetitive or mass-produced content as well as originality and viewer value. Make sure you have the rights to stream the material and read the current YouTube channel monetisation policies; a looping technique is not a promise of monetisation eligibility.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Does OBS loop the file or does YouTube?
OBS repeats the local Media Source when its Loop option is enabled. YouTube receives the live feed OBS sends; it does not repeat the local file for you. The repeat may have a transition, so test the join rather than assuming it is gapless.
Can I use a playlist instead of one file?
Yes, but a playlist is a different source setup from a single Media Source. OBS’s VLC Video source can be used for a playlist and requires VLC to be installed. Test the order, sound and transitions before sending it to YouTube.
Do I have to keep my Mac switched on?
Yes, for this OBS workflow the Mac must keep OBS running and remain connected for the feed to continue. Power settings, sleep, network interruptions or an OBS failure can stop it. Test the actual arrangement for the duration and conditions you intend to use.
Should I go live as soon as OBS connects?
No. First check that the feed appears in Live Control Room and that its preview has the intended picture and sound. Review stream health and the event’s visibility, then use YouTube’s go-live control when you are ready.