Videos, shorts and reels

Content → Videos → Add. Each video is either an uploaded file or a YouTube link.

The fields

Format: Video (landscape) or Short / reel (vertical). Shorts and reels get their own row of vertical players on your Videos page.
Video file: MP4, MOV or WebM, up to 2 GB. It uploads in pieces with a progress bar; a dropped connection retries by itself. Keep the page open until it's done.
Or a YouTube link: a watch, youtu.be or Shorts link.
Cover image (optional): shown before the video plays.
From the release: links the video to a release.
Date, Description, Feature on the home page and Published.
Downloadable from the press kit: promoters and journalists can download the file.

Untick Published to keep a clip off the site and use it only for your posts: the Content queue can attach any video to a post.

Your Videos page, the home page (featured video), the linked release's page and your press kit.
Your app, in the Videos tab.
The home page video stays a landscape video.

An uploaded file plays with no ads and no suggestions of other artists. A YouTube link counts views on your channel. Pick based on your goal.