Yes, the view was from the Bills' side, looking across at the visitors' side.
That said, in the video the sun is almost directly overhead, and both sides of the lower bowl are in the sun. It's not clear how much, but at 0:35 there is a small glimpse of the home side lower bowl that is all in sun. Plus, the left side of the end zone is totally in sun, while the right end zone is not.