Great job to you and Don on this 8-part series of CAVE's music! I'm an avid fan of the muchimuchipork! original sound track, so I'm glad I'm not alone there on loving this soundtrack (Stage one is one of my personal favorites too!).
In regards to the actual videos, perhaps place the composer(s)'s name on the video when a sample of their track is playing, or for their whole segment if they composed the whole album--same with the links in the video description. I like that you added a bunch of links on the game's ost and the tracks you used as samples, but perhaps add the composer--if known--to that field as well? It's a personal preferences, but I like information grouped--especially if there's a great deal of details.
Correct me if I'm wrong, but did you ever explain what a music drama was when you mentioned it? I can't remember if you guys did or not. Did you?