MTV is a pop culture network. They're going to play the mainstream music mostly (that is, pop). Thats why people created the alternative to MTV, Fuse. Fuse is mostly rock, alternative, etc.
yea i agree with u.plus if u go to mtv and type and band name like silverstein they do show up or they do but it's not what u were looking for.That's why I don't watch mtv or any thing like that(well besides fuel and haarac tv) cuz they play ****ty music.to answer your question i really don't know but i know record company do send videos to mtv and ppl will watch like 2 seconds of it then see if it catches their i think goes in a pile and them maybe some else watches it and some on until somebody says okay its a approve to be on mtv.if not they will throw it out but if its from a big company(like bmg,warrens brothers companies like that)they will tell somebody from that company that it isn't what they are looking or what they could do to make it better.if a big company really believes in a act they will pay big money to make that video cuz in they long that money will come back to them.