The gameplay was very good. However, in my opinion, Owl City and Halo just don't mix. I wasn't a real fan of some of the SWAT gameplay as getting multi kills in SWAT isn't as hard as getting them in a regular game but that's all personal preference. A lot of the Sniping was very good as well. Overall, it was pretty solid, minus the music. It didn't really flow with it well.
I agree with what he said, I also think that you should have edited a bit more. Some of the work looked like it was done in windows movie maker, and it looks sloppy. Personally I really like over-edited videos, so I may be a little biased as to my reactions.