Eh, can't think of any that really "disturb" me. I can take a lot. The only thing I can think of is "Dude, Where's My Skin?" by Schoolyard Heroes. Not scary or anything, but I watched it with my friends and they all started screaming when she cut off her tongue. Dunno, sorry I couldn't offer anything better. ^_-
I don't watch many music videos, but the video for "Alejandro" by Lady Gaga really bothers me.
It may partially be because I've been reading lately about a lot of the hidden symbolism and meanings and such behind her videos, but there's something really creepy about that video to me. o.o
Feathers was a great video. Actually I won't say any of the music video's I've seen really scared me, but if you want to see a disturbing concept, watch dollface. YouTube - Doll Face
this isnt the most disturbing but its the only one i can think of
ATM. its kinda creepy. i first seen it on teletoon late at night.
"aphex twin - come to daddy"