Simply, AMVs that best capture the entirety of a single anime--characters, genre, mood, type of action, and so forth--and serve as good introductions to those who haven't seen the show (except for those with spoilers).
It's something I'm interested in, both to remind me of shows I liked and to serve as something to introduce others to them. Well, I have to wonder how hard this might be to keep separate from "favorite video about X", even with me, but I wanted to try.
It has hyper cuteness, it has people dying brutally. Higurashi.
Plenty of zaniness, showcases all the characters, and plenty of romantic comedy.
Shows the main character doing his usual Batman moves, fights with Contractors, and not much in the way of spoilers, at least past the first arc.