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For a single prerecorded video that you want to loop on YouTube Live, OBS is the simpler fit: add the video as a Media Source, enable Loop, and stream the scene to YouTube. MediaMTX is a media server and router, not a documented substitute for OBS’s local-file loop control. It becomes useful when you need to receive, route, convert, or forward a stream—such as forwarding a stream to YouTube over RTMPS.
How OBS and MediaMTX differ
| What you need to know | OBS direct to YouTube | MediaMTX in the workflow |
|---|---|---|
| Main job | Plays and composes local media, then streams the scene. | Receives, routes, or forwards streams as a media server and proxy. |
| Where looping is documented | The Media Source has a Loop property that makes the file play again after it finishes. | The reviewed documentation covers routing and forwarding, not an equivalent local-file loop control. |
| What else is required | OBS, the local video file, and YouTube connection details. | MediaMTX plus a publishing client or other stream source, and forwarding configuration for YouTube. |
| Best fit | A straightforward broadcast from one machine using a prerecorded file. | A workflow needing stream routing, protocol conversion, or forwarding between endpoints. |
This comparison describes the documented workflows; it does not establish that MediaMTX can never be paired with file playback. MediaMTX calls itself a media router for moving streams between endpoints, while OBS documents local-file playback and looping. MediaMTX’s introduction and OBS’s Media Sources guide explain those respective roles.
Loop a prerecorded video with OBS
- Create a scene and add the file. In OBS, select or create a scene, use Sources > + > Media Source, give the source a name, and choose the local video file in its properties.
- Enable looping. Turn on the source’s Loop property. OBS defines this as replaying the file after playback completes. The Media Sources guide lists supported extensions including MP4, TS, MOV, FLV, MKV, AVI, GIF, and WebM.
- Check the scene’s audio and picture. Confirm the video is visible and that its audio appears in the OBS audio mixer. YouTube needs both a video and an audio track; MediaMTX’s forwarding guide explicitly warns that YouTube silently rejects video-only streams. Check your actual source and output before going live.
- Set up the YouTube broadcast. In YouTube’s live setup, create or select the broadcast and copy the current Stream URL and stream key into OBS’s stream settings. Keep the key private. Labels and setup screens can change, so use the values shown in your account rather than a URL copied from an old example.
- Preview, then start streaming. Confirm the scene looks and sounds right, start the stream in OBS, and verify that YouTube receives it before relying on the broadcast. OBS documents that the file repeats after completion; it does not promise a seamless or gapless boundary, so inspect the transition with your own file and setup.
OBS’s Media Sources documentation covers the source and loop property. These playback steps are separate from YouTube ingest: a loop can work locally even if the stream key or connection settings are wrong.
When MediaMTX belongs in the setup
Use MediaMTX when you have a reason to insert a server between a stream source and its destination—not merely because you need a local video to repeat. For example, OBS can publish to MediaMTX using RTMP or WHIP, and can read a MediaMTX stream via RTSP, as shown in the publish documentation and OBS reading guide.
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Capture Card, 4K HDMI Video Capture Card, Game Capture Card, 1080P 60FPS Video Capture Device, HDMI to USB 3.0 Capture Card for Streaming, Work with Camera/Xbox/PS4/PS5/PC/OBS
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MediaMTX can also forward a stream to YouTube. Its forwarding guide shows a YouTube destination configured with a URL and stream key and recommends RTMPS for encryption in transit. The guide cautions that its example YouTube URL may no longer be current. Retrieve the current Stream URL and stream key from YouTube’s live setup when configuring forwarding; never expose the key in a public config or screenshot.
That forwarding example is not a documented replacement for OBS’s Media Source loop control. If your requirement is simply “play this local file over and over,” start with OBS. If you need a routing or forwarding layer, MediaMTX can take that server role, with OBS or another source supplying the stream.
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Common problems and fixes
- The file stops instead of repeating: Open the Media Source properties and confirm Loop is enabled for the source that is actually in the live scene.
- YouTube does not accept the stream: Confirm the current Stream URL and key in YouTube’s live setup, then check the OBS or MediaMTX destination configuration. Do not rely on an old URL from an example.
- YouTube receives no picture or rejects a video-only feed: Confirm the scene outputs video and audio. MediaMTX’s YouTube forwarding documentation says both tracks are required and video-only streams are silently rejected.
- The picture or sound glitches at the repeat point: OBS documents replay after file completion, not gapless transitions. Preview the loop with the actual file and setup; the boundary may need editing in the source video if it is disruptive.
- OBS and MediaMTX are both involved, but the stream does not arrive: Check which component is publishing and which is reading or forwarding, then verify the configured protocol and endpoint on each side. MediaMTX’s read streams guide and publish streams guide describe those distinct directions.
Or let it run in the cloud
If your goal is a YouTube channel that keeps prerecorded videos live without leaving a computer running, StreamNeo is a cloud option: upload a recording or build a playlist, add your YouTube stream key once, and go live. It loops uploaded videos from the cloud; it does not broadcast from a camera.
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- 【1080P 60FPS Video Capture Card】 This HDMI game capture card is based on USB3.0 high speed transmission port, input resolution up to 4K@30HZ, output resolution up to 2K@30Hz or 1920×1080@60Hz. Type c and USB interface can meet most of the devices in daily life. Easily meet the online capture, real-time recording, online meetings, live gaming and other functions, so you have a better visual enjoyment. Note: For capture use only; requires capture software to function and is not intended for direct screen casting to a monitor or TV
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- 【Plug and Play, Easy to Carry】 This HDMI 1080P video capture card does not require any additional drivers or external power supply, just plug and play for fast capture. The capture card is small and lightweight, so you can put it in your bag for emergencies, making it very portable for outdoor live streaming. It's also a great way to share content in game recording, video conference, video recorder and online teaching
- 【Wide Compatibility USB Capture Card】 Easily streams to Facebook, Youtube or Twitch. With the connection, this HDMI to USB C/3.0 video capture devices can be working on several Operating Systems and various software: Windows 7/ 8/ 10, Mac OS or above, Linux, Android, Laptop, Xbox One, PS3/PS4/PS5, Camera, DVDs, Set Top Box, Webcame, DSLR, Switch/Switch 2, TV BOX, HDTV, Potplayer/VLC, ZOOM, OBS Studio etc.
- 【Package Content & Note】 1x HD Audio Capture Card , 1x USB 3.0 to USB C Adapter (A-side 3.0, B-side 2.0), 1x user manual. Please note that you need to restart the OBS Studio software after the audio setup is complete, otherwise it will result in no sound output. When using an adapter, if the device is recognized as USB 2.0, try using the other side with the USB-C port. Simply flip the capture card and reconnect it to be recognized as USB 3.0
- Nothing has to stay on at home: the stream runs from the cloud.
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- Automatic recovery if YouTube drops the stream.
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Monthly: $9.99 per month.
Start your free first day with StreamNeo.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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