Obligatory warning: This script has been designated as a "Retro Script" and there is no guarantee that it will function as described with modern versions of iTunes and OS X and may even corrupt or destroy data.
Simply and quickly edit basic tags of a multiple selection of video tracks in iTunes, including show, video kind, season number, description, long description, comments, lyrics, artist, album, genre, rating and enabled; set played/not played; options to automatically increment track numbers and episode numbers and IDs. I created this AppleScript Studio application for my own use--it's a more thorough big brother to my Set Video Kind of Selected script--when ripping DVDs with Handbrake.
Requires Mac OS 10.4 or later.
Also see Increment Number Tags.
Though not intended to be a "deluxe" tag editor by any means, "Make Video Tags" does allow you to simply and quickly enter some basic tag info to the selected video tracks. (In the above pic, the tracks have been ripped from DVDs which I own in order to watch them on my iPod.)
Create a playlist of random Artists and set number of random songs back-to-back
Perform tasks on a batch of playlists; rename, delete, duplicate, merge, more
Perform search-and-replace on text in your choice of tags
Export files of tracks in two or more playlists to single folder
Copy number prefix in Song Name of selected tracks to their track number tag
Batch merge and/or delete playlists