For one nature clip, add it as an OBS Media Source and enable Loop in its properties. OBS lists several supported video file types, but it does not name one universally best format or codec for every computer.
For a sequence of different clips, use a VLC Video Source playlist instead; that route requires VLC to be installed and its architecture to match OBS. In either case, test the actual files in the scene you intend to stream before relying on them overnight.
Use Media Source for one nature clip
In OBS, add a Media Source to the scene that needs the footage, then select the local video file. This is the straightforward route when a forest view, rainfall shot, or other single clip should repeat continuously. You do not need VLC for the built-in Media Source.
The source properties also let you control how the clip behaves beyond simply choosing a file. For example, Restart playback when source becomes active is a separate setting from Loop. If you want a clip to begin at its first frame whenever the scene becomes visible, consider that option; if you want it to resume or otherwise behave differently when you return to the scene, test the result before choosing.
Keep the nature footage as a source in the scene where it belongs. If you are building a longer broadcast around several scenes, check that switching between them does not create unexpected black frames or leave the clip at an unintended point. OBS source behaviour and scene changes are distinct from the choice of container, so changing a file from one extension to another will not itself decide when playback restarts.
A local source is useful when you want to prepare and preview the full scene on the same computer that will run OBS. It also means the computer must remain available to play and send the stream. If your wider project is a continuous YouTube loop built from many files, the playlist workflow for university lecture streams offers a useful contrast: playlist scheduling and a single looping source solve different playback needs.
Turn on the Loop option
Open the Media Source properties and enable Loop. OBS describes this option as specifying whether a file plays again once playback has completed. With it on, the clip should return to its beginning after reaching the end; without it, playback completes rather than repeating.
Loop is not a gap-removal or editing feature. If the first and last frames show different lighting, wave positions, or camera movement, the restart may be visible even though playback is correctly looping. Likewise, a fade to black at the end remains part of the footage. Inspect the transition point and, if it is distracting, edit or replace the source file rather than expecting the Loop control to smooth it.
The separate Restart playback when source becomes active property is worth distinguishing from Loop. Loop concerns what happens at the end of the file. Restart-on-activation concerns what happens when the source becomes active in a scene. Decide which behaviour suits your scene changes, then confirm it by switching away and back during a local test.
For example, if your scene shows one long river clip throughout a broadcast, Loop is the setting that repeats it after completion. If the same source is hidden and shown as part of a scene change, the restart property may determine whether it begins again from the start. Do not assume the two controls do the same thing simply because both affect playback.
Review OBS-supported video file types
The OBS Media Sources documentation lists .mp4, .ts, .mov, .flv, .mkv, .avi, .gif, and .webm among supported video file types. This is a practical list of extensions to consider when selecting an existing file. It is not a complete promise that every codec profile inside every file will decode on every operating system, OBS build, or graphics setup.
An extension names a container or file type, not the entire encoding recipe. Two files that both end in .mp4, for instance, may differ in video codec, audio codec, resolution, frame rate, or other characteristics. That is why the actual file and the machine playing it matter. The documentation provides extension-level guidance, not a universal codec compatibility matrix.
OBS's Audio/Video Formats Guide is mainly about recording output and container choices. It discusses MKV as flexible for many recording situations and describes remuxing for compatibility, but that does not establish MKV as the best input for looping footage. Recording a new file and decoding an existing source are different jobs. Read the OBS guide to audio and video formats for the recording context, and avoid turning its output advice into a rule for every Media Source.
The supported list is enough to help narrow a first test, not enough to promise identical results from all files. If you already have nature footage in a listed type, there is usually no reason to convert it pre-emptively. First open it in OBS and observe how it plays on the intended setup. A conversion is a troubleshooting step only when you have a specific playback issue or a separate editing requirement.
Choose a file that plays correctly in your setup
Start with a file you already have in a commonly used supported type, such as MP4, and check that exact file in the OBS preview. MP4 is a reasonable common starting point, not a universal winner. The extension alone does not tell you whether that particular file's codecs and settings are suitable for your computer.
If you are comparing two existing files, use the same scene and playback conditions for each. Watch from the first frame through a loop point, listen for any audio if it is present, and look for dropped or uneven movement. The point is not to produce a formal benchmark; it is to establish that the source behaves acceptably on the computer and OBS installation you will use.
Also consider the footage's origin and purpose. A video prepared for an edit may have different dimensions, frame rate, or audio than a simple background clip. If you need the stream at a particular canvas size, check that the image fits the scene as intended, and use OBS's transform or scaling controls deliberately. Cropping a wide landscape to fill a vertical layout, for example, can remove important parts of the view even while playback itself is smooth.
Avoid converting files just because a forum or recording guide calls one container preferable. Conversion can take time and may introduce a new issue, while leaving the file unchanged preserves its original quality. If it fails, inspect the file and local OBS configuration first. OBS documents hardware decoding as an optional setting for certain file types when the GPU has a suitable decoder; it is off by default. It may be worth testing when applicable, but it is not a guaranteed fix.
It is also useful to separate source decoding from outgoing stream encoding. Hardware encoding guidance concerns the work of encoding a stream or recording, not whether a given source file will decode and loop properly. See OBS's hardware encoding guidance for that different part of the workflow. If your concern is live output health rather than local file playback, a sample-rate mismatch check for YouTube streams addresses another separate failure point.
Use VLC Video Source for a multi-clip playlist
When the goal is to play several files as a playlist, OBS's VLC Video Source is the relevant source type. Add the source, then provide the playlist files or playlist input according to the source properties. OBS documents Loop Playlist as enabled by default, so check the setting rather than assuming that a playlist must stop after one pass.
This is different from adding several ordinary Media Sources and enabling Loop on each one. Independent sources do not, by themselves, provide a playlist order that advances from one selected clip to the next. VLC Video Source is intended for playlist-style playback, while Media Source remains the simpler choice for one file that repeats.
VLC is a requirement for this route, not for every video in OBS. If you only need one local nature clip in a Media Source, you can use that built-in source without installing VLC. If you choose VLC Video Source, install VLC first and confirm that OBS recognises it. Without VLC installed, do not expect the playlist source to work.
A playlist can be helpful for a channel that alternates between a waterfall, rain on leaves, and a dawn landscape. It also adds decisions: ordering, repeat behaviour, and what happens if one file is missing or unreadable. Before using it live, inspect the playlist itself and verify that each entry plays. The article on looping a playlist of Hindi videos on YouTube covers a broader playlist use case; for local OBS playback, the source choice and VLC dependency remain the immediate considerations.
Install the matching VLC architecture when required
OBS's documentation states that 64-bit OBS requires 64-bit VLC for the VLC Video Source route. Match the architecture rather than assuming that any VLC installation is interchangeable. Mismatched 32-bit and 64-bit applications are not a supported substitute for the documented pairing.
First check which OBS build you have, then install the corresponding VLC architecture from VLC's own distribution options. If you have already installed VLC but the source is unavailable or cannot find it, verify the architecture before spending time changing the video files. Installing another copy of the footage in a different container will not correct a VLC/OBS architecture mismatch.
This dependency is one reason to keep the choice proportional to the job. One clip needs a Media Source and its Loop option. A multi-file playlist needs the VLC source path and an installed, matching VLC build. If your setup is managed by someone else or you do not want to add VLC, consider whether a single edited file is simpler for this particular scene.
For a wider 24/7 channel workflow, keeping source playback separate from channel health checks can prevent confusion. The guide to monitoring and restarting an FFmpeg YouTube stream concerns a different streaming method, but the distinction is useful: a video source can play locally while the outgoing broadcast has a separate problem, and vice versa.
Test playback and loop behaviour
Test in the scene and on the machine that will actually send the broadcast. Select the source, start playback, and watch it through the end of the clip. Confirm that it restarts when Loop is enabled, and that the transition is visually acceptable. If you use VLC Video Source, test the handoff between playlist items and the return from the end of the list as well.
Check the first and last moments carefully. Nature footage often contains motion that makes a loop point conspicuous: a branch may jump, a cloud pattern may change abruptly, or a wave may reset. A technically correct repeat can still look like a visible cut. If the clip has audio, listen through the same boundary for a sudden silence or repeated sound.
Test scene activation separately if you have enabled Restart playback when source becomes active. Hide or leave the scene and return to it, then note whether playback restarts as you intended. This check catches a common confusion: the file can loop properly at its end but behave differently when the source is made active again.
If playback stutters, freezes, or fails to open, change one thing at a time. Confirm the file opens in the expected source, check that its extension is supported, and review local system load and OBS settings. If the file type and GPU permit it, you can test hardware decoding, but revert the setting if it makes playback worse. The official setting description says it uses a suitable GPU decoder for certain file types; it does not promise to resolve a specific fault.
Finally, monitor the outgoing YouTube preview as well as the OBS preview during a rehearsal. The local source preview can look correct while the broadcast has a separate audio, scene, or connection issue. Conversely, a stream-health warning does not automatically mean the nature file format is wrong. Keep the diagnosis tied to what you observed, and check current OBS Media Sources documentation when a property or supported type may have changed.
If your actual requirement is to run a prepared file continuously without leaving your own computer on, a cloud loop changes the operating arrangement rather than the file-format decision; StreamNeo is designed to remove that need to keep OBS running locally for an uploaded video. It does not remove the need to choose footage you can use or to check your YouTube channel and broadcast setup.
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
What video format works best in OBS?
There is no universally best format established by OBS for looping input. OBS lists several supported file types, including MP4, MOV, MKV, and WebM; test the actual file on the setup you plan to use.
How do I loop a video in OBS?
Add the file as a Media Source, open its properties, and enable Loop. Watch it through the end to check both that playback repeats and that the visual transition is acceptable.
Should I use MP4 or MKV for a Media Source?
Neither is a universal answer. The supported extension list includes both, but the codecs inside a particular file and the local playback environment affect compatibility. OBS's recommendation of MKV in recording guidance is about output recording, not a blanket instruction for source footage.
Can I use a VLC playlist without installing VLC?
No. VLC Video Source requires VLC, and OBS documents that 64-bit OBS requires 64-bit VLC. For one clip, use Media Source instead; VLC is only needed for the VLC playlist route.