Cable television must be one of the most infinite time-sucks ever created. With over 200 channels there are all the old ways to waste timemovies, gossip, critically abhorred but popular programsand a slew of new ones, endless nature footage, todays soap operas tonight, critically acclaimed but cancelled programs. There is also an old way to waste time: music videos, on a new network, Fuse. With five stations, MTV, MTV2, VHI, BET, and CMT, already showing videos sometimes, you would think they were getting enough airplay. "Not so!" cries Fuse, a station whose very existence is predicated on the idea that there just arent enough music videos on music television.