Can't see the offensive player in the view given, but the circumstantial evidence is compelling. Why else would the defender suddenly fall to the ground?
What's with the ball spike on about the 4th play (I think?). Interception - QB runs down interceptor and slings him to the ground OB. Interceptor gets up and raises ball shoulder height and slams it to the ground. Referee just looks like he turns a blind eye. Is this some sort of professional league where that is allowed?
But, the teams have cool uniforms!