This is a section background, so it always autoplays muted automatically — Autoplay/Muted above are ignored here. Check Loop if you want it to repeat.

Uploaded/direct video files auto-detect their own length. GIFs and YouTube/Vimeo links can't report when they're done playing, so this section will hold for however many seconds you set here before the next one is allowed to transition in — leave blank to use the default.