Misbehaviour penalty
Yes. You are sharp.
At 8:14 originally I was looking at the kid and thinking that he could be on slippery ground. He was unlucky in that the bat landed on the corner and the spring in the sponge caused it to kick, making the incident look worse than it was. The match point incident was well deserved though.
Umpire's hint to all players, number 1.
If you are on the show court or the match is being broadcast, expect extra observance from umpires on rules of behaviour.
Umpire's hint to all players, number 2.
If you see another umpire sitting close by with a notebook, be even more careful. That second umpire is marking the match umpire as he under inspection or examination.
You might not like it, but 'c'est la vie' and human nature.