IIRC it also pulls item information from relevant (open API) databases, so you get the synopsis etc filled in?
Looks like it. I added a movie to a collection and it pulled in data from TMDB.
For me starting a new account that also made it kind of overwhelming.
Well, you can use/link a mastodon account if you already have one. Not sure if it supports lemmy accounts.
I tried Rcognize on my Nextcloud install, but appearently I have too few photos fot it to matter. It never started any clustering. Not even from the CLI commands. Had it running for about 6 months, then uninstalled it again as I was getting no real use from it.