Re-watch "fatherhood" and pay close attention to the lighting itself...it's a bunch of red and purple/blue flashing/moving splotches with the occasional flash of green (and the green always happens in about the same area):

http://www.worldcorpo.net/content/video/fatherhood.webm

Now re-watch that creepy Comet Pizza speech:

https://www.youtube.com/watch?v=vlhBn_zSIro

Watch the light orb thing on the right...it can be set to do that same red/purple/blue flashing and there's a green spotlight flashing to the left of it. And in fatherhood the light is primarily coming from one spot down low (the light fades into black around the top of the video), just like this orb on stage.

The white light in each.mp4 could be the same light set to just white instead of color and being carried/aimed by the kid (it seems like the kid is trying to use it to see through the translucent wall at who the voice is, at the very start of each.mp4 the kid says "I can see four of you" and at the end the voice says "That's me, and me, and me" (those are the lyrics to the end of the Calliou song though so who knows, maybe the voice thought it was funny that it could have a double-meaning)

Anyone know what those walls could be? Can we find those anywhere in any pics related to Comet Pizza, like in construction photos or in the background of videos or anything? They sound like plastic when he hits them (I don't think glass would have that "rattle" sound they make when he hits them), but I can't find any room dividers or shower walls etc with a texture and that bar across the middle in a quick google image search...

Something like this is what I was thinking they might be:

http://kinggeorgehomes.com/wp-content/uploads/2015/06/furniture-double-sliding-door-with-opaque-glass-panels-and-steel-frame-for-modern-room-design-with-dark-gray-wall-and-floor-tiles-ideas-opaque-glass-opaque-glass-paint-sliding-opaque-glass.jpg

There are portable room dividers, these could be something they bring out in that room where they have bands play and use it to section the kids off when they do whatever the fuck they're doing in this video to them...also that broom he's using to bang on them would be something you'd find around that band area for clean-up etc