you did great with the effects in sony vegas (especially the lens flares), as well with the text.
The music is epic *-* i love it.
Only when you showed the new arena, it was kinda empty.
I would've been better if you showed it when it was a bit packed.
Tip for next time:
if you render your video in 720p or 1080p (1280 x 720 or 1440 x 1080), youtube will give you a [HD] next to your title and your video also looks nicer.
How to do that in sony vegas:
Go to: file --> Properties (or ALT + Enter). Then set the template to:
HDV 720-30p (1280x720; 29,970 fps)
HDV 720-25p (1280x720; 25,000 fps)
HDV 720-24p (1280x720; 23,976 fps)
HDV 1080-60i (1440x1080; 29,970 fps)
HDV 1080-50i (1440x1080; 25,000 fps)
HDV 1080-24p (1440x1080; 23,976 fps)
(depends on what fps you use)