Check these great channels out and subscribe:
http://www.youtube.com/beatemups
http://www.youtube.com/user/MixedNutsProductions
http://www.youtube.com/user/cygnusdestroyer20xx
http://www.youtube.com/user/squidgame
http://www.youtube.com/user/mamecade
http://www.youtube.com/user/16bitbrothers
http://www.youtube.com/user/arcadeimpossible
http://www.youtube.com/user/luigifreakout123
http://www.youtube.com/user/snesman16