Two cards turn a set of clips into a finished video: Compose Video and Render. Between them you can build the whole thing without leaving the canvas.
Compose Video
Connect your clips into a Compose Video card and it assembles the cut.
Live preview in the card. Watch the cut as you build it, with real thumbnails for each piece.
Per clip timings. Decide how long each piece stays on screen.
Fill styles. One short video can cover a whole song, instead of running out partway through.
Text overlays. Put words over the video.
All 7 aspect ratios.
Everything is set on the card. No bouncing to another screen.
Render
The Render card turns that cut into a finished video file. When it is done:
The video is saved to My Library, tagged MP4 or ProRes
It comes back on the canvas as something you can keep building with
While it works you see a Rendering card with live status
ProRes files are large master files that browsers cannot play, so in your library they show a preview image and a download button rather than a broken player.
Let the Agent do it
The Agent knows both cards. It can set them up and reorder them itself. Try: "put these in this order and make it fit the track."
Compose on the canvas or edit on a timeline?
Compose Video card: fastest when the clips are already on your canvas and the cut is simple. Stays in one place.
Video editor: when you need frame level control, captions with their own styles, voiceovers, or a long edit. What you build there is a composition.
Both end in a render that lands in My Library.