It's obvious that a lot of thought and work has gone into this video.

It falls down slightly on a couple of points, which have been mentioned but I'll repeat them anyway!

Spoofs have to be taken seriously. There are too many grins and "ham" acting moments. You need stronger direction to keep your actors in their roles. They are all acting the part, you don't believe that they are the role.
The voice-over needs work. Listen to V/O on documentaries and image videos. The speaker has to take his/her role seriously believeing that they are voicing a serious video. The speaker becomes a bit "hyper" in parts, a touch of over-acting in my opinion.

Otherwise, a really nice piece of work. I bet you're all really pleased with it.