There's a lot more bad than good officiating there. What the senior assistant is thinking is beyond me, he gets so involved in the brawl he loses his flag. Even after it starts to break up he stays involved trying to orchestrate things, when he should be backing out of it to go and stand by the referee. Then look at his involvement level as the players are being sent off, he really should be leaving that to the referee but it seems he can't help but get involved.
The blowing of the whistle, whilst sensible to start with, becomes farcical by the end. If you've blown your whistle 50 times and it hasn't had an effect, why would you think blow number 51 will ..?!
And then the positioning is really poor. Given it appears that the tunnel is close to one of the corners, why on earth would you start sending players off from the other half of the pitch. He's sent players away back in front of the technical areas and has managed to cause another escalation after it seemed like it had been calmed down.
That said, they did get the cards right and all referees know what a nightmare those situations are