Don't be ridiculous - Canadian 8 went to punch him but could not because Georgian 6 grabbed his hands in time. Later he is seen to throw a red player to the ground. Canadian 6 diving on top of two red players who are lying on the floor, while delivering a huge hit with his fist. Don't say there's only one side to blame.
Apparently the TMO can only be consulted about scoring or not scoring a try or a goal or a touchdown. Not for foul play far away from the goal line. In some competitions (English Premiership?) they are testing this possibility, though.
No, from this video you can actually see the maliciousness of the hit: ball knocked into touch, Saubade makes at least four more steps without the ball and then comes the reckless hit. At *least* a yellow.