he doesn't show it, but before he puts power supply in, he plugs in a rgb plug in the bottom from the case...8min 20 in, so guessing it is the rgb...and yeah, from his unpacking, I'd swap the orientation of the fans to bring air in, otherwise all of them will be exhausting, and you'll have massive negative pressure in the case. it wont look as nice though...either that or leave it as see how it is...seems to be a lot of mesh on bottom so air will be drawn in..can become a bit of a dust magnet though that way...don't know what the filters are like etc...maybe just try and get t up and running 1st before messing with airflow direction etc