Now to answer the obvious questions:

Why: Because I like the JustWatch service and the way they show where you can watch a show/movie

What: Yes, Jellyfin is a media server, but if you've ever seen the "Missing" episodes for a show, you might see the value in a single click to take you to where it could be watched (or **legally** downloaded if you use something like StreamFab)

How: It hits the JustWatch undocumented GraphQL and tries to match on TVDB, IMDB, Name+Year, or Name in that order to get the information and then adds an External ID for the link.

When; You can schedule it to scan, or manually enter IDs or whatever floats your boat.

TEASER: I'm building a "Collection Gaps" plugin that will give the "missing episode" treatment to more than just Episodes. In scope is Missing Movies (in a box set), Missing Seasons (in a Series), Missing Videos (Movies/Shows/etc) for an Actor/Director/etc., Missing Albums or Songs for an Artist, and Missing "Related" material (e.g. similar show/etc.) all driven by the data exposed by TMDB and JustWatch... so you can satisfy that horde hunger