everything that plays is a playlist! playlists for all!

you! and you! all of you, playlists!
http://24.media.tumblr.com/tumblr_mek23eXK041rjfqz6o1_400.gif
validation now exists for the homepage input

query the youtube API for the user, don't proceed if the user doesn't
exist...
wiring video modal, and general cleanup
same cleanup as previous, except for channel services