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For a straightforward prerecorded YouTube Live broadcast, use OBS: add the video as a Media Source, enable its Loop setting, make sure the scene has audio, and connect OBS 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 an intermediary to receive, route, or forward a stream.
OBS and MediaMTX do different jobs
OBS plays and composes media sources into a scene, then sends that scene to YouTube. Its Media Source has a Loop property that repeats a file after playback completes. MediaMTX is designed to receive, route, proxy, and forward streams between sources and destinations. The official documentation reviewed here describes those server functions, but does not document a local-file loop setting equivalent to OBS’s.
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That distinction answers the comparison: OBS is the simpler choice when the task is one local prerecorded file looping into YouTube. Add MediaMTX when stream routing, protocol conversion, or forwarding through a server is part of the setup. This is a comparison of documented workflows, not a claim that MediaMTX cannot be paired with software that plays files. See the OBS Media Sources guide and MediaMTX introduction.
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| Question | OBS direct to YouTube | MediaMTX in the workflow |
|---|---|---|
| Main role | Plays the local media source, composes the scene, and streams it. | Receives, routes, or forwards a stream as a media server or proxy. |
| Where the documented loop control is | In the OBS Media Source properties. | The reviewed MediaMTX documentation describes routing and forwarding, not an equivalent local-file loop control. |
| Components for the basic workflow | OBS, a local video file, and YouTube connection details. | MediaMTX, a publishing client or other stream source, and YouTube forwarding configuration. |
| Best fit | A single machine, prerecorded file, and direct broadcast. | A workflow that needs stream routing, protocol conversion, or forwarding separated from the production client. |
Loop the video with OBS
- Create or open a scene. In OBS, select the scene that should carry the broadcast.
- Add the file. In the Sources area, use + and choose Media Source. Select the prerecorded file in the source properties. OBS lists MP4, TS, MOV, FLV, MKV, AVI, GIF, and WebM among the supported extensions in its Media Sources documentation.
- Enable looping. Turn on Loop in the Media Source properties. OBS defines this setting as controlling whether the file plays again when playback completes.
- Check picture and sound. Preview the scene and confirm that both video and audio are present. Listen and watch across a loop boundary using the actual file and setup: the documented loop behavior does not guarantee a seamless transition without a pause, black frame, or audio seam.
- Connect to YouTube. In YouTube’s live setup, retrieve the current stream URL and stream key, then enter the connection details in OBS’s streaming settings. Keep the key private; do not show it in screenshots or share it. YouTube’s displayed ingest details are the ones to use, rather than an old copied endpoint.
- Start and verify the broadcast. Start streaming from OBS and check YouTube’s live interface for the incoming video and audio. Verify that the file continues into another play-through before relying on the setup for an extended broadcast.
OBS’s loop setting addresses playback; it does not by itself establish that the YouTube connection is live. Keeping those two checks separate makes it easier to tell whether a problem is in the file/source or in the ingest connection.
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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
- 【1080P HD High Quality】Capture resolution up to 1080p for video source and it is ideal for all HDMI devices such as PS4, PS3, Xbox One, Xbox 360, Wii U, DVDs, DSLR, Camera, Security Camera and set top box. Note: Video input supports 4K30/60Hz and 1080p120/144Hz. Does not support 4K120Hz/144Hz. Output supports up to 2K30Hz.
- 【Plug and Play】No driver or external power supply required, true PnP. Once plugged in, the device is identified automatically as a webcam. Detect input and adjust output automatically. Won't occupy CPU, optional audio capture. No freeze with correct setting.
- 【Compatible with Multiple Systems】suitable for Windows and Mac OS. High speed USB 3.0 technology and superior low latency technology makes it easier for you to transmit live streaming to Twitch, Youtube, Facebook, Twitter, OBS, Potplayer and VLC.
- 【HDMI LOOP-OUT】Based on the high-speed USB 3.0 technology, it can capture one single channel HD HDMI video signal. There is no delay when you are playing game live.
- 【Support Mic-in for Commentary】Rybozen capture card has microphone input and you can use it to add external commentary when playing a game. Please note: it only accepts 3.5mm TRS standard microphone headset.
When MediaMTX belongs in the setup
MediaMTX is relevant when OBS or another source should publish a stream to a server, and that server should then route or forward it. The MediaMTX documentation shows OBS reading a server stream via RTSP and publishing to MediaMTX via RTMP or WHIP; see Read with OBS Studio, Publish streams, and Read streams.
For a MediaMTX-to-YouTube route, its forwarding guide shows a destination configured with a URL and stream key, and recommends RTMPS to encrypt the connection in transit. The example endpoint on that page is explicitly described as the URL YouTube reported when the documentation was last updated, and may no longer be current. Retrieve the current Stream URL and key from YouTube when configuring the route; do not copy a stale example blindly.
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Guermok Video Capture Card, 4K USB3.0 HDMI to USB C, 1080P 60FPS & 2K 30FPS
- 【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
- 【Ultra Low Latency Screen Sharing】 HDMI capture card is made of good quality aluminum alloy with strong heat dissipation, allowing you to enjoy ultra low latency while live gaming or video recording or live streaming, avoiding blue screens and lag. This HDMI to USBC capture card supports easy recording of good quality audio or HD video and transferring it to your computer or streaming platform, allowing you to record 60 fps HD video directly on your hard drive and real-time preview
- 【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
MediaMTX’s guide also warns that YouTube requires both a video and an audio track and silently rejects video-only streams. Make sure the forwarded stream contains audio as well as video. MediaMTX adds a routing layer; it does not remove the need for a source that plays the prerecorded content.
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Keep the loop and YouTube connection reliable
- No picture or sound at YouTube: confirm the OBS scene is active and the Media Source has the intended file, then check that the scene has audio. For a MediaMTX forwarding workflow, verify that both video and audio reach the forwarding destination.
- The file plays once and stops: reopen the Media Source properties and confirm Loop is enabled.
- OBS plays locally but YouTube does not receive the stream: check the current YouTube stream URL and key in the live setup, and compare them with the connection details entered in OBS. Do not reuse a key or endpoint from an old tutorial without confirming it.
- MediaMTX does not forward to YouTube: inspect the forwarding destination and current YouTube connection details. Use RTMPS as recommended by MediaMTX’s forwarding guide, and confirm the source includes an audio track.
- A brief seam appears between repeats: OBS documents repeat-after-completion behavior, not gapless playback. Check the file’s ending and beginning and test the actual playback chain; do not assume the transition will be invisible or inaudible.
Or let it run in the cloud
If you want a YouTube channel to keep playing uploaded prerecorded videos without leaving a home computer on, StreamNeo is a cloud option: upload a recording or build a playlist, add your YouTube stream key once, and go live. It keeps the stream running from the cloud, with no computer, OBS, or home connection required to stay on.
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Capture Card 4K HDMI Video Streaming to USB 3.0 1080P 60FPS Capture Device
- High-Quality Video Capture, 4K HDMI Capture Card Ready: Capture smooth and vibrant video with this 4K HDMI capture card, engineered for gamers and content creators who demand crisp 1080P 60FPS video quality. Whether you're streaming to Twitch or recording gameplay for YouTube, your footage will look professional and detailed
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Video Capture Card, 4K USB3.0 HDMI to USB C, 1080P60FPS HDMI Capture Card for Streaming, Gaming, Video Recording Compatible with Switch, Xbox, PS4/5, OBS,iPad Mac OS Windows,Camera, Zoom(Silver)
- 【4K HDMI Input, 2K@30Hz Recording】Powered by a true USB 3.0 high-speed interface, the capture card supports up to 4K@30Hz HDMI input and records at 2K@30Hz or 1080P@60Hz. Perfect for gamers, streamers, and professionals who need crisp, smooth video for live streaming, gameplay recording, or online meetings.
- 【Ultra Low Latency Screen Sharing】Built with a premium aluminum alloy shell and advanced chipset for stable heat dissipation, ensuring ultra-low latency transmission. Capture high-quality video and dual-channel audio in real time—no lag, no frame drop—ideal for Twitch, YouTube, or OBS streaming.
- 【Easy Plug and Play, Compact & Portable】No driver or external power required—just plug and play via USB 3.0 or Type-C connection to your Windows or macOS computer. Lightweight and compact design makes it easy to carry for outdoor streaming, live shows, or mobile recording setups.
- 【Wide Compatibility & Multi-Device Support】Compatible with Windows 7 8 10 11, macOS, Linux,Android and supports most popular software such as OBS, Zoom, VLC, Twitch Studio, and more. Works seamlessly with PS4, PS5, Xbox, Switch, DSLR cameras, TV boxes, and other HDMI-output devices for streaming to YouTube, Twitch, etc.
- 【What You Get】Includes: HDMI Capture Card, USB 3.0 to USB-C Adapter, User Manual. Tips: Make sure your tablet’s OTG function is enabled before connecting. Test your HDMI device with a monitor first to confirm video and audio output, then connect to the Video Capture Card for recording.
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![VIXLW 4K HDMI Video Capture Card, Cam Link Card, HDMI to USB 2.0 Game Audio Adapter, Record Capture Device for Streaming, Teaching, Gaming, Live Broadcasting, Video Conference [Windows]](https://m.media-amazon.com/images/I/41e6jd88Y4L._SL160_.jpg)
VIXLW 4K HDMI Video Capture Card, Cam Link Card, HDMI to USB 2.0 Game Audio Adapter, Record Capture Device for Streaming, Teaching, Gaming, Live Broadcasting, Video Conference [Windows]
- 【4K VIDEO CAPTURE CARD】Made with upgraded chip, captures 4K@60Hz video input at full speed, no lag, no delay, capture card also supports 1920×1080@30Hz highest image quality output, capture video to USB through HDMI, you can Directly save to computer and mobile phone; suitable for high-definition video live broadcast, video capture, online conference, video streaming, video course; equipped with high-definition USB cable.
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- 【Wide Compatibility】The video capture card adopts advanced chips, intelligent identification equipment, and is widely compatible with electronic equipment, which can easily capture wonderful moments and comes with a USB cable. It supports third-party video capture software such as OBS, Win, MacOs, Android, etc. It can also perform video capture and online live broadcast at the same time, store and share videos at the same time, and easily realize video splicing, which is very convenient.
- 【24 hours local technical support】We have a professional technical team for more than ten years, serving you 24 hours a day. You are welcome to contact us if you have any questions.
- One flat price per slot for any uploaded quality up to 4K 60fps; it streams the file as uploaded, with no re-encode or quality tiers.
- Automatic recovery if YouTube drops the stream.
- The first day is free, with no card required; one free day per account.
- Monthly: $9.99 per month.
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