The Tool Desk
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What the setup does—and what it does not do
OBS’s Media Source plays the ProRes file from your computer. OBS then encodes the video it sends to YouTube. YouTube’s live ingest settings list H.264, H.265/HEVC and AV1; ProRes is not listed as a live ingest codec. OBS documents ProRes support for MOV and MKV formats, but a supported file extension does not guarantee smooth playback for every ProRes profile, frame rate or color configuration. Test the exact file on the machine you will use.
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This is a file-based stream, not a camera broadcast. The video must be accessible locally to OBS for playback. OBS is free and open source; its overview explains the canvas, scaled output and frame-rate controls: OBS Studio Overview.
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Check the source file
- Confirm the file plays correctly, including its full duration and audio, before adding it to OBS.
- Note the source resolution, frame rate, audio tracks and whether it is SDR or HDR. Matching the output to the intended presentation avoids unintended scaling or frame-rate conversion.
- Allow enough local storage and disk access for uninterrupted playback. The official guidance does not establish a universal storage-device or computer requirement; performance depends on the particular file and host system.
Create or select the live stream
- In YouTube Studio, create a live stream or select the event you intend to use.
- Copy the stream URL and stream key shown for that stream into OBS’s streaming settings. Treat the key like a password: anyone with it may be able to send video to your channel.
- YouTube normally detects the incoming resolution and frame rate. Its help guide describes custom stream keys for manually selecting resolution where needed. Use the settings associated with the actual event and verify the incoming signal in YouTube Studio.
YouTube recommends RTMPS where supported. Its live setup and encoder guidance is at Choose live encoder settings, bitrates, and resolutions.
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Add the ProRes file as an OBS source
- Open the scene you want to broadcast in OBS.
- In the Sources panel, select + and choose Media Source.
- Create a new source or select an existing one, then browse to the local MOV file.
- Enable Loop if you want playback to repeat. Use Restart playback when source becomes active if each activation should begin at the start. Hardware decoding, when available, can be tested; it is not guaranteed to work better on every system.
- Choose whether to hide the source when playback ends. If the source should remain visible, plan an explicit ending or transition rather than assuming a finished file will continue producing video.
- Check framing in the preview. Right-click the source and use the transform options as needed to fit or fill the canvas without accidentally cropping important content.
OBS’s documentation describes Media Source as a way to add media files to a scene and lists MOV among supported extensions, along with playback controls: Media Sources.
Set the video output to 4K60
- In OBS, open Settings > Video.
- Set Base (Canvas) Resolution to 3840×2160 if you are composing the scene at 4K.
- Set Output (Scaled) Resolution to 3840×2160 for a 4K outgoing stream. If the source or computer cannot sustain this, lower the output rather than sending an unstable stream.
- Set Common FPS Values to 60 (or the equivalent 60 fps option shown by your OBS version).
- Check that the source’s aspect ratio and intended frame rate suit the scene. A 60 fps output does not make lower-frame-rate source footage contain additional motion detail.
Choose the encoder, codec and bitrate
YouTube’s US English live settings guide, accessed October 3, 2026, gives the following 2160p60 guidance. These are YouTube recommendations, not a guarantee that a particular computer or internet connection can sustain the stream.
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| Outgoing codec | YouTube minimum at 4K60 | YouTube recommended at 4K60 |
|---|---|---|
| AV1 or H.265/HEVC | 10 Mbps | 35 Mbps |
| H.264 | 14 Mbps | 50 Mbps |
In OBS, open Settings > Output, choose the streaming output mode appropriate to your setup, select an encoder available on your system, and configure the codec and bitrate. Encoder names and availability vary by operating system and hardware. H.264 is OBS’s broadly compatible web codec; AV1 or HEVC may be available only with particular encoders and platform support. Do not select a codec simply because YouTube lists it—confirm your OBS encoder can produce it and your setup can handle it.
Set rate control to CBR and keyframe interval to 2 seconds. YouTube recommends 2 seconds and says not to exceed 4 seconds. For a 60 fps stream, that corresponds to a keyframe interval of 120 frames at two seconds if OBS presents the setting in frames. Use AAC or MP3 audio for RTMP/RTMPS. OBS’s format and codec documentation is available in its Audio/Video Formats Guide.
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SDR and HDR choices
For SDR, YouTube’s guidance recommends Rec. 709 and 8-bit video. For HDR, its guide lists H.265/HEVC and 10-bit, and says AV1 is not supported for HDR. Keep the source, OBS color settings and encoded output consistent; test the exact source-to-output path because the guide does not guarantee how every ProRes profile or host configuration will handle HDR.
Check upload capacity and test before going live
- Run an upload-speed test on the same connection you will use for the event. Compare stable upload capacity with the chosen video bitrate plus audio and other network use. YouTube advises testing upload speed but does not prescribe a universal headroom multiplier, so do not treat a brief speed-test peak as proof of sustained capacity.
- Start a private or unlisted test stream with footage that has similar motion and audio to the planned broadcast.
- Check OBS’s dropped-frame and rendering indicators, listen for audio problems, and verify YouTube Studio’s stream health and messages.
- Run the test long enough to expose playback, temperature, network or disk problems that a short preview can miss. YouTube Help says, “Make sure to test before you start your live stream.”
- For 4K/2160 live streams, YouTube’s cited guidance says the low-latency option is unavailable; expect normal latency.
Troubleshoot common failures
YouTube does not receive a signal
- Check that the stream key and stream URL belong to the selected event and were entered correctly in OBS.
- Confirm OBS is actually streaming and that the selected output encoder starts without an error. If you exposed the key, replace it in YouTube Studio and update OBS.
Video stutters, drops frames or goes offline
- Compare the selected bitrate with sustained upload capacity. If the connection cannot hold the rate, reduce the bitrate or output resolution and retest.
- If OBS reports rendering or encoding strain, test a lower output load or another encoder available on your system. The official sources do not support a universal hardware prescription.
- Check the source file’s playback on the same machine. A MOV extension alone does not establish that the particular ProRes profile decodes smoothly.
The stream is not 4K60
- Verify both OBS Base (Canvas) and Output (Scaled) Resolution are set as intended, and that FPS is set to 60.
- Check YouTube Studio’s detected incoming resolution and frame rate, and confirm the selected stream key or custom key is not imposing a different resolution.
- Allow for YouTube’s processing and verify the actual live playback quality rather than judging from the source file alone.
There is no audio, or playback stops unexpectedly
- Check the Media Source’s audio routing and OBS audio meters, then listen to the YouTube test stream.
- Inspect the source’s loop, restart and hide-when-playback-ends options. A completed file will not continue on its own unless looping or another scene/source is arranged.
Copyright and YouTube channel considerations
Having a local ProRes copy does not itself grant permission to broadcast its music, footage or other included material. Before streaming, confirm you have the rights or licenses required for the content and any embedded audio. YouTube may identify copyrighted material and apply restrictions or other actions. Repeatedly looping a file also does not guarantee monetization: channel monetization eligibility and reused-content review are separate from the technical ability to send a live stream. Review YouTube’s current policies for the specific content and channel before relying on a stream for revenue.
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