To stream a pre-recorded portrait video as a YouTube Live broadcast, send it through an encoder to YouTube Live Control Room with a vertical output configured. YouTube’s vertical live experience may let viewers discover that broadcast while browsing Shorts, but it does not guarantee placement in the Shorts feed.
This is a live broadcast workflow, not an upload of a finished Short. Check channel eligibility, prepare the portrait file, set up the encoder and test the preview before you publish.
How vertical live discovery works
A vertical live stream is a YouTube Live broadcast presented in a vertical viewing experience. YouTube says viewers can find vertical live streams while browsing the Shorts feed in the YouTube app. That is a discovery opportunity, not a promise that a particular stream will be shown to people, or that it will attract views.
The distinction matters if you have a finished video in mind. Uploading it as a Short and sending it to YouTube Live are different workflows, with different presentation and controls. In this guide, the file is the content source for a live broadcast: the encoder sends it to YouTube as a live signal, and viewers watch while the broadcast is active.
A portrait file is only one part of the setup. You need an eligible channel, live streaming enabled, a vertical format sent to the correct stream key, and a preview that looks and sounds right. YouTube also says scheduled live streams and Premieres do not appear in the vertical live feed. If Shorts-feed discovery is central to your plan, account for that limitation rather than assuming that scheduling an event will provide the same experience.
Check account eligibility and live access
Before preparing the broadcast, confirm that the channel can go live. YouTube’s eligibility requirements include a verified channel, no live-streaming restrictions in the preceding 90 days, and a streamer who is at least 16 years old. Requirements and interface labels can change, so check YouTube’s current live-streaming requirements and the Live Control Room rather than relying on an old tutorial.
If you have never enabled live streaming on the channel, activation can take up to 24 hours. Do this well before the planned broadcast. Discovering the wait when you are ready to publish is a preventable failure, particularly when the video and encoder are already prepared.
In YouTube Studio, use Create → Go live to open Live Control Room. Select the encoder workflow and create or choose the stream for the broadcast. Keep the title, description, audience setting and visibility consistent with what you intend to publish. If you are scheduling the broadcast, remember that scheduling does not make it eligible for the vertical live feed.
Prepare the portrait video
Start with a video that is genuinely composed for portrait viewing. Check that the important subject, text and action sit within the visible frame on a phone. A landscape source cropped to portrait can lose information at the sides; placing a full landscape frame inside a portrait canvas instead can leave unused space. Preview the actual vertical composition before encoding or sending it.
Check the whole file, not just its opening frame. Look for black bars, unexpected crops, titles too close to the edges, pauses that seem like a frozen picture, and changes in loudness between segments. If you plan to repeat the video, inspect the end-to-start transition: a hard cut, silence or sudden change in image may make the loop conspicuous. For a playlist or longer rotation, the practical concerns overlap with looping pre-recorded videos on YouTube Live with FFmpeg, though the encoder and playback method you choose are your decision.
Make sure you have permission to broadcast the video and its audio, and check that the content is suitable for the audience settings you choose. This guide does not determine whether a particular file meets YouTube’s policies or rights requirements. Review the current official rules for your content and channel.
Configure the encoder for vertical output
Use an encoder that can play the file and send a live signal to YouTube. YouTube’s guidance lists H.264, H.265 or AV1 for video, AAC or MP3 for audio, constant bitrate (CBR), and a recommended two-second keyframe interval that should not exceed four seconds. It recommends RTMPS where supported. Consult the current encoder settings guidance for the supported settings and resolutions; do not assume every encoder exposes identical controls.
The output shape must be vertical. In a third-party encoder dual-stream setup, YouTube directs creators to select RTMP(S) in Live Control Room, choose a second stream key for the vertical output and send the matching format to each key. Do not send a horizontal output to the vertical key or assume that one output will be converted automatically into the other. Set up the vertical format before starting: YouTube says you cannot add a vertical format after the stream has begun.
Choose resolution and bitrate with the source file and your upload connection in mind. A larger bitrate can carry more detail, but it also needs more sustained upload capacity. YouTube advises a 20% bandwidth margin in its streaming tips. Leave that margin rather than selecting a rate that uses nearly all the available upload speed; other people or devices on the connection may need capacity too.
| Choice | What to check | Practical trade-off |
|---|---|---|
| Portrait output | The canvas and image sent to the vertical stream key are vertical | Correct framing supports phone viewing; a crop can cut off content |
| Video format | H.264, H.265 or AV1, as supported by your encoder | Match the encoder’s capabilities to YouTube’s current guidance |
| Audio format | AAC or MP3 | Check that the selected output includes the intended soundtrack |
| Rate control | CBR | A steady target is easier to compare with available upload bandwidth |
| Keyframes | Two seconds recommended; no more than four seconds | Keep the interval within YouTube’s guidance |
| Transport | RTMPS where supported | Use the encrypted option when your encoder offers it |
These are settings to check, not a guarantee that every combination will work on every machine or connection. If the encoder has a preset, inspect its actual output rather than trusting the preset name. The quality must fit your available upload bandwidth, and a stable lower resolution is more useful than a higher target that repeatedly loses connection.
Connect to YouTube Live
In Live Control Room, copy the YouTube server URL and the stream key for the output you are configuring. Paste them into the encoder’s corresponding fields, taking care to match the vertical stream to the vertical key. YouTube’s instructions for creating a live stream with an encoder cover the standard connection flow. Treat the stream key like a password: do not include it in screenshots, a public tutorial or a message to someone who does not need it. If it is exposed, reset it through Live Control Room.
If you use a local encoder, your own computer runs the playback and sending process. You need to keep it operating, maintain the connection and watch for problems. That can suit a one-off stream or a workflow where you want direct control of playback and encoding. For help thinking through recovery from a local interruption, see how to make a 24/7 YouTube music stream restart after internet loss. A restart plan does not replace checking the stream after a connection drop.
For a scheduled broadcast, start the encoder and wait for the incoming preview in Live Control Room. Check that it is the intended vertical feed before clicking Go live. Starting the encoder and publishing the event are separate steps in this workflow; do not click through on the assumption that the right file or output has loaded.
YouTube identifies Gyre in its encoder information as a cloud-based tool for 24/7 prerecorded-video live streaming. Treat that as a lead to investigate, not an endorsement or a verification of its present features, terms, price or suitability for vertical output. Compare any cloud workflow with local encoding on scheduling, looping, monitoring, recovery, vertical support and current terms. Cloud playback can be useful if you do not want your own computer to run continuously, but verify the exact capabilities and obligations directly with the vendor before deciding.
For a longer-running file-based broadcast, StreamNeo addresses the specific burden of keeping your own computer on to send the uploaded video; decide separately whether its YouTube-only workflow fits your vertical-output requirements, and verify those requirements before relying on it.
Run a preflight test
A preflight is a short check of the actual path from file to YouTube preview, not a guess based on encoder settings. Use representative material: a section with movement, any on-screen text, and the loudest or quietest audio in the file. If the video will loop, check the transition as well. Confirm that the preview is vertical, framed as expected, and free from accidental bars or overlays.
Check these points before publishing:
- The channel is eligible, verified and has live streaming enabled.
- The encoder is using the intended server URL and the matching vertical stream key.
- The preview shows the correct portrait output and not a horizontal or blank source.
- Audio is present, at an appropriate level and in sync with the picture.
- The stream health panel does not show a problem you have not investigated.
- The connection has headroom above the selected bitrate, including YouTube’s recommended 20% bandwidth margin.
- The title, visibility and audience settings are correct, and the stream key has not been exposed.
A test on the same network and device arrangement you plan to use is more informative than a test made elsewhere. If the preview stutters, lower the output demand or investigate the connection before publishing. If the picture is cropped, fix the canvas or source framing, not the stream key. If sound is missing, check the selected audio track and output format. Change one thing at a time where possible so you can tell which adjustment helped.
If this is meant to stay live for hours, decide who will notice and respond if the signal stops. A checklist for a longer-running channel can be adapted from the 24/7 stream pre-flight checks. A successful preview confirms that the feed is reaching Live Control Room at that moment; it does not establish that the broadcast will never drop or that YouTube will surface it in a particular place.
Understand feed and device limitations
The vertical live-feed experience is available in the YouTube app and not on tablets, according to YouTube Help. Viewers may encounter your live stream while browsing Shorts, but that does not mean every viewer, device or session will present it in the same way. Check the current YouTube Help page on watching and interacting with vertical live streams for the latest description of the viewing experience.
Scheduled live streams and Premieres are not included in that vertical live feed. If you need an event time or a scheduled reminder, you can still consider a scheduled broadcast, but do not describe that as a route to vertical live-feed placement. The content may be vertical and live without being eligible for every discovery surface.
Nor is a vertical live broadcast simply a Short that happens to be longer. It uses Live Control Room and an encoder connection, with a live preview, stream health and a stream key. Its discovery depends on YouTube’s product experience and viewer context, not only on your choice of aspect ratio. Plan the stream so it is useful to viewers who arrive during the broadcast, and give them enough context in the title and description to understand what is live.
For a channel that primarily loops devotional music, ambience or lessons, the choice between local encoding and a cloud service is operational. A local encoder gives you hands-on control but depends on a powered computer and a stable connection. A cloud option may reduce the need to leave a personal computer running, but features and terms vary and need checking with the provider. Neither choice guarantees Shorts-feed placement; the key decision is whether the workflow can deliver and monitor the format you need.
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
Can a vertical live stream appear in the Shorts feed?
It can be discovered in YouTube’s vertical live-feed experience while people browse Shorts in the YouTube app. Placement is not guaranteed, and scheduled live streams and Premieres do not appear in that feed. Tablets are not supported for this viewing experience according to YouTube Help.
Can I turn a landscape recording into a vertical live stream?
You can make a vertical canvas or crop from a landscape source, but inspect the result carefully because the crop can remove important content. Send the vertical output to the correct vertical stream key when using the dual-stream encoder setup. A portrait-shaped frame alone does not ensure that text or action is framed well on a phone.
Can I loop a pre-recorded file as a YouTube Live broadcast?
The workflow here sends pre-recorded video through an encoder as a live signal; choose a playback method that can continue the file or playlist for the period you intend to broadcast. Check the transition between repeats and monitor the incoming preview and stream health. Do not confuse a live broadcast using a recording with uploading a finished Short.
What if I have never streamed live from this channel?
Check the current YouTube eligibility requirements, verify the channel and enable live streaming in advance. First-time activation can take up to 24 hours, so do not leave it until just before the event. Wait for the encoder preview in Live Control Room before publishing a scheduled stream.