YouTube Shorts remix: Cut is 1-5 seconds, plus 3 other modes

Shorts Remix has four video options: Cut, Green screen, Collab and Template. Cut takes a 1-5 second segment with audio and video, Green screen uses another video as your background, Collab sits your clip next to another Short, and Template reuses another Short's structure. Audio can be sampled too, up to 90 seconds from music videos.

The details here come from YouTube's help page on remixed content, read 2026-10-02. Sume cannot remix someone else's YouTube video, and this post says where that line is.

What are the four Shorts remix options?

The help page names each option, and the numbers are specific only for Cut and audio.

How does YouTube credit the source?

Credit is automatic. The page says the source of remixed audio is credited on the Sound Library page, and the source of remixed video is credited in the Shorts player with a link to the video.

Not every video can be sampled. The page says some videos may be unavailable depending on their privacy settings or who has claimed copyright ownership.

Is a 1-5 second Cut enough for a full Short?

A Cut is a sample, not the whole Short. You add your own footage around it. The overall length ceiling for a Short is separate; YouTube's Shorts creation help says Shorts can be up to three minutes long.

If you want to see how a sample fits before you shoot, a practical workaround is to prepare your own side of the edit as a file first. That is where Sume is useful: it prepares footage you own, not footage you sample.

Where does Sume fit next to Remix?

Sume has no Remix, Collab or Template feature and cannot pull another creator's Short. Its media routes need a clip that is already a media.sume.com artifact in your workspace, and they refuse off-host URLs.

What it can do is prepare your own side. Video trim cuts a range from one of your clips (duration can be as short as 0.2 seconds), and Timeline 1.0 joins ordered video[] slots against one audio spine with transitions such as fade or slideup. For example, a 4-second reaction clip of your own can be cut like this:

curl -X POST https://api.sume.com/v1/video-trim \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: reaction-cut-001" \
  -d '{
    "video_url": "https://media.sume.com/artifacts/artf_demo/reaction.mp4",
    "start": 3,
    "duration": 4,
    "mode": "sync"
  }'

Should I remix at all after the October 2026 originality change?

Remix is YouTube's own, attributed path, so the source stays linked. A re-upload of someone else's clip is a different thing, and YouTube has tightened that. See YouTube cuts reach for reposted Shorts for what is known, and How long can a song play in a YouTube Short for the audio limit.

What should I check before I remix a Short?

Check that the source is still sampleable, since the help page ties availability to privacy settings and copyright claims. Check how much of the final Short is the sample. A 1-5 second Cut inside a 30-second Short is a different thing from a Green screen over the whole video.

Check the audio. If you sample audio from a music video, the page gives 90 seconds as the upper bound and 30 seconds for some partner agreements, so a long sample can be refused for reasons that have nothing to do with your edit. Finally, decide up front what happens if the source disappears; see what happens when a source is deleted.