A few more vid essentials:

I see astridv has Sisabet covered. If you dl just one of those, make it "Whatever."
Stuff she missed:
Vrya/a> - "Schism" - Absolutely jaw-dropping Spike portrait.
Laura Shapiro - "Ing" - Anya.
Heresluck - "Superstar" - The definitive Faith vid.
Ascian - "I Touch Myself" - An incredibly creative and funny, ah, commentary on Buffy/Spike.
Big Truck Productions - "Failed Experiments in Video Editing" - A Cowboy Bebop vid, sort of. Download it.