I have a TV library that has 246 collections. Yes, I know that’s a lot. I have all my music videos organized into one collection per artist, so 246 artists = 246 collections. I’m sure there are other instances where users may have a lot of collections as well.
I would like to edit these collections to add a label, so I can share specific artists with different groups, but I don’t want to do this 246 times.
Along these lines, a “Select All” button everywhere the “Deselect All” buttons appear would be useful as well.
I’ve been searching forums to find out how to do exactly what your saying: how to edit groups of songs and/or movies at the same time to apply a common collection name. I also wonder if there is a way to change the original file name or metadata that would automate the file to have a collection name ascribed. Until I read your message, I was thinking “there’s got to be a way”. Perhaps not?
No, that’s not what OP is asking for.
He wants to use multi-selection in the “collections” view mode of a library, which is not possible currently.
What you want to do, can be done already, by using multi-selection of movies/videos and albums or artists in the regular library view mode.
(You cannot put single songs into collections anyway).
If your videos are in MP4/m4v containers, you can fill the ‘Album’ meta tag of these files with the collection name. Plex will put them into a collection by that name, upon initial library scan.