I recently wanted to have virtual demo clip playlists showing up as movies. For example, I wanted Surround, Bass, Visuals, Music, and Animation as virtual movies containing clips. The clips were actually Particles.
I found a simple way was to tag my clips with a media sub-type of TV Show. I used Demo Clips as the Series and used Surround, Bass, etc. as Seasons. I left them in alphabetical order, but to change the order I could have used Episode and numbered them.
I haven't put these in Video > Movies since Video > Shows is fine for me. There may be a way to use this method and make virtual albums that show up in Music.
The only problem I've had so far is that the cover art doesn't want to apply to my Series and Season.