Haven't watched the whole thing, but what is really annoying me is that the video isn't filling up the whole screen.
Make sure you check the 'Stretch video to fill output frame size' before you render so it doesn't happen again.
And this is an alright way to get good at editing video before you start recording yourself. Only thing is you have all the editing right there (except any extra you put in).
EDIT
Alright for a first, and already having most of the editing done. A7X, of course, because its you. Other songs were good. Only thing I don't like about the DDG one is all I can find is low quality versions.
Couple suggestions
1) Don't even think about using WMM (unless you're skilled like Otter)
2) Look above the edit
3) Don't call it 'VGF Tribute Video' when it is only some [ASQ] and some [S3]. Go hunting in this media section. Grab some videos from General_Gregory, Mr~Pan, Repercussion (hollow). Try to get as many of the members here that record and post into the video. It is a nice idea though.
4) Get used to Vegas so you have the knowledge when you need it.