Here is the video with the sound like gunshots (wheels visible starting at 0:09, yelling starts a 0:44, shot sounds start at 0:57)
http://www.youtube.com/watch?v=frgKTW3jm_Y&feature=player_embedded
Here is a video of the Polish plane crash (wheels visible at 0:12)
http://www.youtube.com/watch?v=_QE9EPZdw5s
The wheels are distinctive, and they match, so the first video is indeed the Polish plane crash. The yelling and the shot sounds seem to go together, but it could be warning shots fired at looters/trespassers.
That video is weird. Someone in the comments below was translating it. Something doesn’t seem all right. I believe the video as genuine, but what about the authorities in the photo? The shots, the possible things they said?
I thought the shots could also be ammo from body guards on the plane cooking off. But the few rounds I’ve heard cook off did not sound like a gunshot.