If I thought the audio was a mess, with this video is even worst! so difficult to follow, the animation doesn't helps...
It was a mess from the start, so no surprise. This intro sounds better though, if only they would trim the ending as well. It makes me wonder how I would do it.
It's of course a topic of discussion, but I would probably make sure to have a list of all the names of players written on the screen, flashing when they are heard, or constantly glowing if they are heard all the time. Maybe something like a tag cloud with a player's name getting bigger. Anyhow, there are some ideas. At least I would make it consistent so it's easier to follow who's playing, which IS the purpose of the video, right? But overall, not bad.
Bottom line, my scores would be: Cause 10/10, Idea 1/10, Recording 6/10, Video 6/10, Design 7/10, so 30/50 — not bad, but could be drastically improved.