M2, or maybe it's MTV2 now, I don't know, but anyway, they're doing a thing now where they are playing all of the videos in the "MTV vault" in alphabetical order. I've been rather disappointed with the videos played, in that it's not an all comprehensive list of videos. But. They have played 2 Sleeper videos so far... Inbetweener and Nice Guy Eddie.

http://www.mtv.com/mtv/tubescan/mtv2/az_center_i.html
http://www.mtv.com/mtv/tubescan/mtv2/az_center_n.html

Even thought the lists are rather incomplete, especially to fans of British music, it's still fun to read over. you can check any letter up to N, simply by changing the letter in the URL.