To make a YouTube Short from footage you already have, pick one moment that makes sense on its own, cut it to 3 minutes or less, frame it vertically (9:16) so the action stays in view, check the audio and captions, and upload it. YouTube treats any square or vertical video up to 3 minutes as a Short, so the shape and length of your export decide most of the outcome.
How much work sits in front of that upload depends on your source. A 40-second clip you’ve already trimmed needs a reframe and a polish. A four-hour stream recording needs you to find the moment first, and that search is usually the slow part.
Which workflow fits your footage?
The right workflow depends on whether you already have the moment or still need to find it.
| Your footage | Main job | Where to start |
|---|---|---|
| A short clip that’s already cut (under 3 minutes) | Reframe to vertical, trim, caption | Any editor with a 9:16 canvas, or YouTube’s own Shorts editor |
| A long video already on your YouTube channel | Pick a segment, then edit it | YouTube’s Edit into a Short or the Clips and Shorts tool in YouTube Studio |
| A stream recording or VOD | Find the highlights, then cut and reframe each one | Scrub the recording yourself, or use a highlight-finding tool |
The first row is an editing problem. The last two are search problems followed by an editing problem, and the tools for each are different.
How do I make a Short from an existing video?
A Short from an existing video takes five steps once you know which moment you want, whether it’s a gameplay recording or a clip saved from a stream.
- Pick a moment that stands alone. Viewers scrolling past have none of your video’s context. A clutch round, a funny reaction, or a clear tip works; a moment that needs the previous ten minutes doesn’t.
- Set up a 9:16 canvas. Create a vertical project first, then place your footage in it. If you crop a 16:9 recording into 9:16, decide what the frame should follow: the crosshair, the player character, or your facecam.
- Cut the dead time. Start as close to the action as you can and end right after the payoff. The first and last two seconds are where most clips drag.
- Check audio, captions, and overlays. Balance game audio against your mic, add captions if you talk through the clip, and keep text away from the edges of the frame.
- Export and upload. Keep the file at 3 minutes or less and in a square or vertical shape. YouTube’s help page says Shorts can be uploaded at a maximum resolution of 1080p, so a 1080 × 1920 export is a sensible target.
If the source is a long-form video that’s already public on your own channel, YouTube offers a shortcut. On the video’s watch page in the YouTube app, tap Remix, then Edit into a Short, and select up to 60 seconds. YouTube’s help page limits this to your own public long-form uploads. Private videos, unlisted videos, and videos with third-party copyright claims can’t be used, and the finished Short links back to the original.
How do I make Shorts from a long video or stream?
Shorts from a long recording start with finding the 30 seconds worth posting, which is the real work; the editing is the easy half.
- Scrub it yourself. Note timestamps, export each segment, and edit it as above. It’s slow, but it works for any source.
- Use YouTube Studio’s Clips and Shorts tool. If the long video is already on your channel, YouTube Studio lets you pick a segment by selecting text in the transcript or entering timestamps. YouTube says AI-suggested moments are available only in select countries and languages, so don’t count on them.
- Use a highlight-detection tool. These scan a recording for likely moments and hand you a list of clips to review.
How do I make YouTube Shorts from a Twitch stream automatically?
YouTube Shorts from a Twitch stream can be made automatically by connecting your Twitch account to a highlight-detection tool that pulls each VOD after you go offline, scans it for highlights, and returns vertical clips for you to review. YouTube’s own tools can’t help here, because Edit into a Short and Studio clips only work on videos already uploaded to your YouTube channel.
Automatic stream clipping has three limits worth knowing before you set it up:
- The VOD has to exist. The tool reads your Twitch past broadcasts, so VOD saving must be on and the recording must still be available on Twitch.
- Detection finds candidates, not finished Shorts. The AI picks moments from signals in the footage. You still review each clip, fix the start and end points, and decide what to post.
- Posting is a separate step. Finding the highlight, editing it, and uploading it to YouTube are three jobs, and only the first is fully automatic.
For gaming streams, Eklipse turns long videos into short clips by scanning a VOD for in-game cues, mic volume spikes, and chat velocity. You can connect a Twitch, YouTube, Kick, or Facebook account so recordings are fetched after each stream, import a publicly accessible YouTube video by URL, or upload an MP4. Each route has its own limits:
- Twitch: streams from 15 minutes to 5 hours, broadcast in the last 14 days
- Manual upload: MP4 files from 15 minutes to 4 hours, under 10 GB
- YouTube link: the video has to be publicly accessible, and you choose a content type (Gaming, Podcast, IRL / Just Chatting, or Variety)
Most streams finish processing in minutes, though a four-hour VOD can take up to an hour. Treat the results as a shortlist. Eklipse’s own help docs call the AI selection a starting point, and you can adjust each clip’s start and end points in Eklipse Studio before exporting. Creating an Eklipse account is free, and you can sign up and connect your Twitch account to start the scan; generating and exporting clips requires a Premium or Premium Pro plan.
How do I edit the clip for vertical viewing?
Vertical editing of a widescreen game throws away about two-thirds of the picture, so the crop has to be deliberate.
- Follow the action, not the center. In a shooter, keep the crosshair and the enemy in frame. In a platformer or racing game, keep the character and enough of the path ahead to read the moment.
- Watch the HUD. A kill feed, scoreboard, or minimap often sits in a corner that a center crop cuts off. If that element is the point of the clip, move the frame or place it in a separate panel.
- Split facecam and gameplay when it helps. A stacked layout with your camera on top and gameplay below keeps reactions in view without shrinking the game to nothing.
- Check it on a phone. Watch the full clip on a phone-sized screen before you upload. Text that’s readable on a monitor can be too small at that size.
If you already have the clip and want help with the vertical edit, Eklipse’s YouTube Shorts editing workflow covers it. Eklipse Studio offers vertical layout templates, a facecam and game feed layout, trimming, text, and auto-captions you can edit. When you’re done, you can download the file or share it to a linked social account from Studio.
How do I turn Twitch clips into YouTube Shorts?
Twitch clips become YouTube Shorts once you download or link the clip, reframe it from widescreen to 9:16, add captions, and upload it to YouTube. Twitch clips already fit the length rule, since a native Twitch clip runs 5 to 60 seconds, so the work is the vertical layout, not the trim.
- Get the clip. For clips of your own channel, open the Twitch Creator Dashboard, go to Content, then Clips, and download the file from the share options. Clips of someone else’s stream need that streamer’s permission before you repost them.
- Reframe to 9:16. Twitch clips are usually 16:9. Stack facecam over gameplay or follow the action, as in the vertical-editing tips above.
- Add captions and check the audio. Twitch audio often carries music from the stream, which can trigger a copyright claim once the Short is on YouTube.
- Upload to YouTube. Use the upload steps and checklist below.
Eklipse’s AI Edit skips the download step. AI Edit takes a Twitch or Kick clip URL, a clip from your AI Highlights library, or an MP4 upload under 1 GB, as long as the clip runs 15 seconds to 3 minutes, and reframes it vertically with captions. For a clip made from a stream, the original VOD has to still be public on Twitch or YouTube.
For a single clip and no account, the free Eklipse AI Reframe browser tool accepts a Twitch clip URL, a direct .mp4 or .webm link, or an MP4, WEBM, or MOV upload, and exports 9:16, 4:5, or 1:1. The tool can’t read YouTube links, so download your footage first if that’s where it lives.
How do I upload and check my Short?
Uploading a Short from a computer starts in YouTube Studio: click Create, then Upload videos, and select your file. Before you publish, run through this list.
- Length and shape: 3 minutes or less, square or vertical. A 16:9 file uploads as a regular video.
- Framing: the subject and any key HUD elements are visible in every second of the clip.
- No black bars: bars mean the footage and the canvas don’t match. Fix the canvas instead of uploading as-is.
- Readable text: captions and overlays are legible on a phone and clear of the edges.
- Clear audio: your voice isn’t buried under game sound, and nothing clips or peaks.
- Copyright: YouTube blocks Shorts longer than one minute that carry an active copyright claim, including Content ID claims. If a clip uses music or footage you don’t own, clear it or keep the Short under a minute.
- Title and description: both describe what actually happens in the clip.
Frequently asked questions
Can I make a YouTube Short from a long video?
Yes. Cut a segment of 3 minutes or less, frame it square or vertical, and upload it. If the long video is public on your own channel, YouTube’s Edit into a Short option lets you select up to 60 seconds of it directly in the app, and the Short links back to the original.
Can I make Shorts from a livestream recording?
Yes, as long as you have the recording as a file or a supported VOD. Cut each highlight to 3 minutes or less and reframe it vertically. YouTube’s help pages for Edit into a Short and Studio clips don’t say whether past live streams are supported, so exporting the recording and editing it yourself is the reliable route.
Should I crop a video to 9:16 before uploading?
Yes, if you want it to fill the phone screen. YouTube accepts square video as a Short, but only 9:16 fills a vertical player. Crop it yourself so you choose what stays in frame.
What is the difference between turning a long video into clips and editing a clip for Shorts?
Turning a long video into clips means finding moments worth posting. Editing a clip for Shorts starts once a moment is chosen and covers the vertical crop, trim, captions, and export. Long recordings need both steps; a clip you’ve already cut needs only the second.







