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To run a prerecorded video as a YouTube live stream overnight, use OBS Studio on the spare Windows PC: add the video as a looping Media Source, connect OBS to a scheduled YouTube stream with its stream key, and set Windows not to sleep. Test the complete setup before leaving it unattended. Neither a compatible PC nor a stable-looking connection guarantees an uninterrupted stream.
Before you start: check channel, PC and video
- Channel: YouTube requires a verified channel with no live-streaming restrictions in the past 90 days. First-time live-stream activation can take up to 24 hours, so enable it well before the planned broadcast.
- PC: OBS lists Windows 10 or Windows 11 and a DirectX 10.1-compatible GPU among its basic Windows requirements. Meeting those requirements does not guarantee that the PC can stream your chosen resolution and frame rate; OBS says actual capacity depends on the encoder, settings and scene complexity. Test this machine with the intended video and settings.
- Video rights: Use a video and audio you are entitled to stream. YouTube requires streams to comply with its Community Guidelines and warns that trailer content must not infringe others’ rights. That trailer-specific warning is not a complete copyright analysis for every type of video.
- Connection: Measure the PC’s outbound upload capacity and select a stream bitrate it can sustain. YouTube recommends about 20% bandwidth headroom above the total streaming bitrate. A reliable wired connection may be practical if the PC supports Ethernet; an optional Cat 6 cable is not a requirement and cannot guarantee continuity.
Set up the YouTube live event
- Open YouTube Studio and go to Create > Go live to open Live Control Room. Use the Manage tab to schedule the stream.
- In the event’s stream settings, copy the stream URL and stream key. In OBS, open Settings > Stream and enter the server URL and key in the corresponding fields. Treat the key like a password: anyone who has it may be able to send video to your stream. Do not share it publicly.
- Choose an appropriate visibility setting. For a rehearsal, use Unlisted if you want to test without listing the event publicly; confirm the event’s access and visibility before the real broadcast.
- Allow time to check the Live Control Room preview and stream health before the scheduled start. YouTube recommends preparing the encoder two hours ahead and being ready 15 minutes before the event; treat these as preparation guidance, not reliability guarantees.
Make the prerecorded video loop in OBS
For one video file
- Open OBS and select the scene that will feed the stream. In the Sources box, select + and choose Media Source.
- Name the source if useful, then select the video file stored on the PC. Enable Loop in the source properties so playback restarts when it reaches the end.
- Check the preview. Make sure the video fits the canvas as intended and that the source’s audio is present. If the picture is cropped or has empty space, adjust the source in the preview rather than assuming YouTube will correct it.
- Keep the video file available at the same location for the whole broadcast. If you move or rename it after setting up the source, OBS may no longer find it.
For a playlist of files
OBS’s separate VLC Video source can play a playlist and offers a Loop Playlist option. It requires VLC to be installed on the PC. Use the built-in Media Source for a single looping file; use VLC Video when you need multiple files to play in sequence.
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Choose settings the PC and upload connection can sustain
There is no single safe bitrate or resolution for every spare PC and internet connection. Pick a profile based on the video, the encoder the machine can handle and a real upload test. YouTube advises leaving about 20% headroom between the total streaming bitrate and available upload bandwidth; do not allocate the connection’s entire measured capacity to the stream.
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As one reference point, YouTube’s settings table lists 2 Mbps as the recommended video bitrate for 720p at 30 fps, with 6 Mbps as the top of the stated range. That is not a universal setting or a guarantee of smooth streaming. Use YouTube’s current settings table for the intended resolution and frame rate, then test the selected profile on this PC and connection. Account for the total stream bitrate, including audio, when comparing it with upload capacity.
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Keep Windows awake overnight
- In Windows 11, open Settings > System > Power & battery > Screen, sleep, & hibernate timeouts.
- Set the sleep timeout so the PC will not sleep during the planned broadcast. The screen timeout is separate, so the display can turn off while the computer remains awake.
- Connect the PC to power and check that the selected power settings will remain in effect for the entire run. Do not assume a dark screen means the computer is asleep—or that a running OBS window prevents Windows from sleeping.
- Before leaving the PC, close or disable anything likely to interrupt the run, such as a pending restart prompt. This is a practical precaution, not a guarantee against power, network or software failures.
Test the whole setup before leaving
- Start OBS streaming ahead of the scheduled event and confirm that the Live Control Room receives the feed and shows a preview. If YouTube does not receive video, check the stream URL and key in OBS.
- Watch and listen to the preview. Confirm that the video moves, the loop works, audio is audible and in sync, and the intended event can be accessed with its current visibility setting.
- Check OBS and YouTube’s stream-health indicators, then let a test run long enough to catch problems such as the PC sleeping, the media source failing to repeat or the connection struggling under the selected bitrate. An unlisted practice event is useful when you need to check the workflow without making the stream public.
- Monitor audio, video and stream health during the actual event if you can. YouTube warns: “A disruption on your connectivity could mean a broken stream.” A preflight test reduces avoidable setup errors but cannot rule out a later interruption.
End the stream and handle the archive
YouTube says streams under 12 hours are automatically archived. Do not assume a longer stream will be fully saved as an archive. If a complete YouTube archive matters, plan a run shorter than 12 hours. When the event is over, end the stream in YouTube as appropriate and stop the encoder in OBS.
Common problems and fixes
- Live streaming is unavailable: Check channel verification and whether the channel has a live-stream restriction in the past 90 days. If this is the first activation, allow up to 24 hours rather than waiting until broadcast time.
- YouTube receives no signal: Confirm OBS is using the stream URL and key for the scheduled event, and that streaming has been started in OBS. If in doubt, retrieve the correct details from YouTube Studio and enter them again; keep the key private.
- Video plays once and stops: Reopen the Media Source properties and enable Loop. For a playlist, check the VLC Video source’s Loop Playlist setting and make sure VLC is installed.
- Stream stutters or drops: Compare the total stream bitrate with measured upload capacity and preserve YouTube’s recommended headroom. Lower the stream profile and test again if the connection cannot sustain it. Wi-Fi or wired Ethernet may work depending on the setup; a cable alone does not guarantee continuity.
- OBS stops when the screen goes dark: Check Windows sleep settings, not just the screen timeout. Windows lets the display turn off separately from sleep.
- Preview is silent or incorrectly framed: Check the OBS source’s audio and the scene preview before going live. Confirm the correct video file is selected and adjust its fit in the scene.
- The PC struggles at the selected quality: Test a lower resolution, frame rate or bitrate rather than assuming that meeting OBS’s basic system requirements proves this machine can stream the desired profile.
Or let it run in the cloud
If you would rather not leave a spare PC running overnight, StreamNeo keeps a YouTube channel live from uploaded videos in the cloud. Upload your recording or build a playlist, add your YouTube stream key once, and go live. Your computer and home connection do not have to stay on. The same service supports any uploaded quality up to 4K 60fps at one flat price per slot, with no re-encoding or quality tiers; it can automatically recover if YouTube drops the stream. The first day is free with no card. Monthly billing is $9.99 per month. StreamNeo is for YouTube streams using uploaded videos, not camera broadcasts. See StreamNeo, or start the free first day.
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Frequently Asked Questions
Can I use OBS for a prerecorded YouTube live stream without a capture card?
Yes. For this setup, OBS plays a local video through a Media Source; a capture card is not part of the described workflow.
DriversCrashes, No Sound, or Screen Glitches?PerformanceWindows Errors? Fix Them Before They SpreadDriversOutdated Drivers Are Slowing You Down
Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
Can I leave the monitor off while OBS streams?
Yes. Windows separates the screen timeout from sleep, so the display can turn off while the PC stays awake.
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Does a successful test guarantee the overnight stream will stay live?
No. A test can reveal configuration problems, but it cannot prevent later network, power or software interruptions.
Quick Recap
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