There is already a website that does this. In addition to a heavy metal tv, they have 8 other channels to choose from. Ranging from current rock/metal, 60's, 70's, 80's, 90's, 21st century, prog rock, and a soft rock/ ballad channel. My favorite is the prog rock channel and the heavy metal channel which they call Hard & Heavy is quite good. About 60% of what they show on the H&H channel I enjoy but yeah but show some shitty core and grind. Probably going to be the same thing when this new website goes live.
http://rocktelevision.com/
wow, rocktelevision.com is pretty cool... Yea, you can probably find it all and more on youtube, but I enjoy the randomness of it, kinda brings back memories from the good old days of video. They have quite a few ads on the site which I'm sure takes care of the expenses... Thanks for the link!