Clemson/Arkansas block/charge play (Video)

[Sharpshooternes]

1. Block
2. Charge.
3. No call or block

I think one and three look as if the offensive player changes direction to avoid contact but the defender keeps moving in the same direction illegally. To me play one it was enough for there to be a called block. Play three I think is a flop, thus the no call, unless there is enough contact (hard to tell from the angle) to warrant a block being called.