Some workflows around video production might find it useful to have the actual YouTube URL early in the process.

To provide a link to next week's video/ the next of a series inside the previous?

URL shorteners do this trick, can just update the redirect. Most people just put videos in a playlist so it comes recommended next though.

And end cards were made for exactly this purpose - you can't put them in the description but at the end you can link to latest video in a playlist.

Video descriptions can be edited.