It's impossible to know, from the video, what part the young man played in his own troubles in the jail. In each of the first two incidents I saw in the video, he said something to the guard and he also said something to one of the other inmates and then started the incident by punching another of the inmates in the face. Unless we know what he said, we can't know why he was attacked. And in the gang attack, he started the fight so he got what he deserved.
Secondly, I'd note that in the first incident, with the guards, all the guards who roughed him up were black. In the second incident, the two guards who protected him and got him to safety were white.
Thirdly, he was out of the jail for 2 and a half years before he killed himself - what happened both to him and for him in those intervening years between jail and death? Anyone know?
Finally, I'd say this video does nothing to support the "black lives matter" nonsense since I didn't see a single black person in the video who gave a **** about black life they were trying to end.
This video says more about blacks in America than it does about the American Justice System. Americans should be glad these less than humans are off the streets.