Halo Theme Song Performed By 80 Guys In 1 bathroom + Girls Point of View

This video has been going throughout the entire gaming community, and there have been two videos: one from inside the restroom and the other outside from girls recording. I've decided to take upon it myself to show both videos and trying to find the exact time both videos where recorded. So by doing this I tried to find it using sound, so when both videos are being compared, the audio is left untouched.

Update: Now if you listen closely to the ending of the first clip, you hear girls laughing. However at that moment the girls already recorded the loudest part of the performance. If you also listen closely, when you see the blonde guy turn around, you can hear the girls laughing. So it's safe to assume that they where laughing afterwards.

Thanks, keep on watching