You can send horizontal and vertical versions of a YouTube live stream at the same time using Live Control Room’s built-in dual-stream option. YouTube derives the vertical view from your horizontal picture by default, so check its crop and layout before you go live.
You can also configure a compatible third-party encoder to send a separate vertical output with a second stream key. That takes more setup and is not supported by every workflow; choose it only when you need independent control of each picture.
Check eligibility and activate livestreaming early
Before you plan a dual-format broadcast, confirm that your channel can livestream. In YouTube Studio, check that live streaming is enabled and that the channel has no live-streaming restrictions in the previous 90 days. YouTube’s live streaming setup guidance explains the current eligibility and activation process.
If this is the first time you are enabling live streaming, do not assume activation will be immediate. YouTube says it may take at least 24 hours after your request. Make the request well ahead of an event or launch, then return to Studio and confirm that the live controls are available before you prepare graphics, schedule a broadcast or invite viewers.
Do a separate content and rights check for anything you intend to broadcast. A stream’s technical eligibility does not establish that you have permission to use its music, video or other material. For a continuous devotional or music channel, the planning in how to stream Indian music 24/7 on YouTube without leaving a computer on may help you think through the broader broadcast, but it does not replace checking the terms that apply to your content.
The safest test is a private or unlisted rehearsal using material you are entitled to stream. Confirm that the channel can start a live broadcast, that the planned output appears in Live Control Room, and that you can inspect the vertical preview. Resolve access, scheduling and framing problems while there is still time to change the plan.
Know what YouTube sends in each format
For streams started from Live Control Room, YouTube’s built-in dual-stream feature is on by default according to its current Help instructions. It provides a horizontal output for viewers watching in the usual player and a vertical output for eligible viewing surfaces. One broadcast can therefore serve different screen orientations without asking viewers to choose between separate scheduled streams.
The routing matters. YouTube says viewers watching in the Shorts feed in the YouTube mobile app see the vertical version; other viewers see the horizontal version. The current guidance describes one shared live URL and the same live chat for both presentations. That gives viewers a common destination, but it does not mean every viewer sees the same composition or has the same discovery route.
Vertical live may appear in the mobile app’s vertical live feed and Shorts browsing. That feed is available in the YouTube app, not currently on tablets, and scheduled live streams and Premieres do not appear in it. Treat the vertical feed as a possible way for mobile viewers to encounter a live broadcast, not as a promised source of audience.
The viewing and creator features are not identical between formats. YouTube’s vertical and horizontal live feature comparison sets out differences: for example, clickable links in chat and channel description, live pre-roll and mid-roll ads, 4K broadcast bitrate, Premieres and Live Redirect are listed for horizontal streams, while vertical feed discovery and scrolling are vertical strengths. Memberships are listed for both; fan-funding features depend on eligibility. Check the current comparison for details that matter to your channel rather than assuming that a dual-format broadcast carries every feature in both views.
For a local news loop, a horizontal layout may keep a ticker and a wide shot legible to desktop viewers, while vertical framing can make a presenter more prominent on a phone. For a bhajan stream with a singer and instruments spread across the frame, a crop may cut off useful context. These are production choices to test, not a reason to expect either format to perform better.
Preview the default centre crop
The default vertical output is a centre crop of the horizontal picture. YouTube takes the middle portion of the widescreen image to fill a tall screen. If your subject is centred and the important material sits near the middle, this may be an adequate starting point. It does not preserve all composition details: people, text, instruments or graphics near either side can disappear.
Think about the actual safe area, not just whether the source video contains a person. A presenter standing to one side may be clipped. A shop display with prices at both edges may lose the information viewers need. A landscape or temple camera shot may become an unrecognisable fragment when the centre is mostly empty sky or a doorway.
Open YouTube Studio on a computer, choose Create → Go live, and use Live Control Room to schedule or manage the stream. In the scheduled stream’s Manage view, inspect the vertical preview before publication. If the preview is not available or the labels have changed, consult YouTube’s current setup instructions rather than guessing at controls.
A useful rehearsal is to place temporary markers near the left and right edges of a test graphic, then see what remains in the vertical preview. Do not put essential wording right against the edge and assume the crop will keep it. Remove the markers before a real broadcast, and check the actual camera or video source as well as the preview: a static test card can reveal crop boundaries, but not whether a moving subject will drift out of view.
Adjust the vertical layout around the subject
YouTube’s built-in layout choices include centre crop, fit to phone width and stacked. You can change zoom and position, and YouTube says layout edits can continue during a live stream. The right choice depends on what needs to remain visible, not on a general rule that one layout is best.
| Layout | What it does | Consider it when | Check before going live |
|---|---|---|---|
| Centre crop | Fills the vertical frame from the middle of the horizontal picture | The main subject and essential detail already sit near the centre | Check that faces, text and objects at the edges are not cut off |
| Fit to phone width | Fits the horizontal picture across the phone width | Keeping the full width matters more than filling the tall frame | Inspect how unused space above or below the picture looks |
| Stacked | Arranges content in a vertical composition | Two parts of the picture each need a place in the tall frame | Check that neither part becomes too small to understand |
Use the preview to adjust the position and zoom until the main subject sits comfortably in frame. For a presenter with a graphic, for example, a crop centred on the presenter could lose the graphic; a stacked arrangement may keep both visible, though it can make each section smaller. For a wide musical ensemble, fitting the full width can retain the performers but leave unused space in the vertical view. Decide which compromise serves the viewer better.
Keep text large enough to read on a phone and away from the edges. A title card designed for a television screen may shrink too far when the whole picture is fitted to phone width. Conversely, zooming in to make that text larger may crop people or instruments. A separate portrait-designed graphic can help, but the built-in layout is still working from the stream’s available picture; it is not a substitute for a wholly independent vertical scene.
If your channel relies on a repeated visual template, test more than its opening frame. A moving camera, a guest who changes position or a rotating set of images can make a layout that looked right at the start unsuitable later. For a study-beats channel, compare the finished composition with the practical planning in how to make a 24/7 YouTube study beats radio stream; the format preview should be treated as part of the visual check, not as proof that every frame works.
Choose an encoder and second key only when needed
You may prefer an encoder workflow when you need a separately composed vertical picture rather than a crop or rearrangement of the horizontal output. A compatible third-party encoder can send a horizontal stream to its usual destination and a vertical stream to a second YouTube stream key. The encoder must support the required simultaneous outputs and RTMP(S); do not assume that any encoder, preset or computer can produce both reliably.
In Live Control Room, use the Stream tab and the vertical preview’s Auto menu to choose Encoder, then select RTMP(S) and the second stream key for the vertical output. Keep the destinations straight: send the portrait output to the vertical key and the landscape output to the horizontal key. Confirm both outputs and their previews before starting. YouTube’s instructions say the vertical format cannot be added after the stream has started, so set up the second output in advance rather than trying to repair the configuration mid-broadcast.
This route offers more control over what the vertical viewer sees, but adds points of failure. You need to compose, encode and route two outputs correctly, and you need to monitor both. If the encoder only sends one picture, or its vertical scene is poorly framed, having a second key does not solve the underlying problem. If all you need is a usable phone presentation of a centred subject, the built-in option is simpler to prepare.
An encoder may also add computer load or require more careful configuration. If you already run a long broadcast from OBS, assess whether the computer can sustain the additional output and test it under the same conditions as the real programme. This is particularly relevant for an always-on channel: the practical advice in OBS YouTube live loop uses too much CPU: settings to reduce load can help you consider load, but it cannot certify that your specific dual-output setup is stable.
You can disable YouTube’s built-in dual-stream setting from Stream settings by turning off Dual stream. That is useful if you have decided not to provide the vertical version or are using a workflow that should not use the built-in output. Make the choice deliberately and verify the preview and routing; changing a toggle without checking the resulting destinations can leave you with the wrong presentation.
Test both formats in Live Control Room
Schedule or prepare a rehearsal in Live Control Room before the date you care about. Start with the built-in path if it suits the production, then inspect the horizontal and vertical previews. Check the whole frame, including titles, lower thirds, side graphics and any text embedded in the video. For an encoder setup, verify both stream keys and both outputs before going live; a correctly framed source sent to the wrong key is still a failed setup.
Check how the stream will be encountered. The same live URL serves the two presentations under YouTube’s current instructions, but viewers’ devices and viewing surfaces affect which version they see. Test on a phone in the YouTube app if vertical presentation matters, and use another suitable screen or browser to inspect the horizontal player. A preview in Studio is valuable, but it does not tell you whether the finished picture feels balanced at normal viewing size.
Test movement and transitions, not only a still image. A presenter who leans across the frame, a scrolling news ticker, a changing camera shot or a lyric line appearing near an edge can fail the vertical composition after a promising opening. If the programme loops, inspect a representative point from each scene and verify that transitions do not flash, obscure text or reveal an unsuitable crop.
Make a short checklist for whoever starts the broadcast: channel eligible, stream settings confirmed, correct layout selected, horizontal and vertical previews checked, keys matched to outputs if using an encoder, and a phone presentation reviewed. Give the operator enough time to correct a problem. YouTube’s first-time activation may need at least 24 hours, but that is not a rehearsal window; activation should be requested earlier, with a separate test before the public stream.
For an event where missing the opening matters, decide in advance what to do if the vertical output is wrong. You might continue with the horizontal stream while correcting a layout that YouTube allows you to edit during the broadcast, or stop and fix an encoder routing issue that cannot be safely changed live. The right fallback depends on the event and audience; communicate it to the operator rather than improvising under pressure.
Monitor the viewer presentation and reporting
Once live, watch the output rather than assuming the setup remains correct. Confirm that the horizontal picture is visible and that the vertical preview still keeps the subject in frame. If you change zoom or position during the broadcast, check the result afterwards on a phone-sized screen. A successful signal in Studio does not guarantee that small text, a ticker or a distant face is easy to follow.
Remember that both presentations use the same live chat according to YouTube’s current Help page. A moderator or presenter should not assume there are separate conversations for each format. If you display instructions on screen, make them work for people viewing either composition, and avoid relying on a graphic that is present only at the far edge of the horizontal frame.
Live Control Room initially reports combined metrics for the two formats. Vertical-specific metrics are available 24 hours after the stream ends. To examine them, YouTube’s analytics instructions direct creators to Studio’s Content → Live area, then an ended stream’s Analytics and Advanced mode, where Playback location can be set to Vertical live feed. Consult YouTube’s analytics guidance for live streams if the interface differs.
Use the separate report to understand where viewing occurred, not as a verdict on a layout in isolation. A change in the programme, time, promotion or audience can also affect the result. Compare like with like where possible, and note what you changed in framing so that a later test is interpretable. Do not assume that adding a vertical version will automatically increase discovery or viewing.
For a recurring channel that needs the broadcast to continue while your own computer is off, StreamNeo can remove the specific burden of keeping a local machine running for a file-based stream. It turns an uploaded video into a YouTube live broadcast; it does not replace checking that your source file is suitable for both compositions or that the channel is eligible for live streaming.
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 YouTube stream vertical and horizontal at the same time?
Yes. YouTube’s built-in dual-stream option in Live Control Room can provide both formats, and is on by default for streams started there according to current Help instructions. A compatible encoder can also send separate outputs using the appropriate stream keys, but not every workflow supports this.
Does YouTube’s vertical version keep the whole horizontal picture?
Not by default: the vertical view starts as a centre crop, so content near the sides can be lost. You can try fit to phone width or stacked layouts, then adjust zoom and position; inspect the preview with your actual programme material before broadcasting.
Can I add the vertical output after the live stream has started?
YouTube says the vertical format cannot be added after the stream starts in the encoder workflow. Configure and test the vertical key and output beforehand. The built-in layout has controls that YouTube says can be edited during a live stream, but do not confuse changing a layout with adding a missing encoder output.
When can I see vertical-only analytics?
Live Control Room shows combined metrics first. YouTube says vertical-specific metrics are available 24 hours after the stream ends, through the ended stream’s analytics and the Playback location filter for Vertical live feed.