NO!!
1) Being okay with police beating people, especially the vulnerable like teens, like in this video is sadism. Those cops felt good punching them and spitting on them like they deserved it as you suggest OP. This will only create a deeper hunger for sadistic justice in their minds.
Or even worse, they were already sadistic and this event increased their sadism.
2) Thinking this is justice is like wishing a rapist went to jail to get ass-fukked by other men.
Power is a hella of a drug. That man/men who raped him will increase their hunger for rape.
3) After the video, fukk is wrong with that man talking and his nose and lips??????
Weren't they off?