The video is a good watch, but the view about how Kaepernick's stance 'didn't work' doesn't make a lot of sense to me because it was heard around the world and he made a very big noise that cost him his career. If the idea that it 'didn't work' is that the world didn't change overnight then fair enough, it didn't, but this is a long road and if the 1960s were step 1 of 100 steps, we're still maybe only at step 10, we will not get to step 100 overnight and not during these protests. But the protests should still happen, although I wouldn't condone acts of arson, because they might take us to step 20 or step 50 quite quickly.
The part I struggle with the most, I think, is that as a (white) member of a mixed race family, I want the cause and the argument behind it to be absolutely robust and bullet proof when its discussed. There is a bullet proof argument to be made, but some people are not making it because they're too busy trying to shame people who are actually on their side for not doing 'enough' (members of my family are falling out about this, all of whom are mixed race). Its a dogmatic view, and dogma is not good. I'm also seeing a lot of debate closed down, and I don't think that's healthy either.
I think rofesleg has a point that sometimes band wagon jumpers serve to cloud the issue rather than further the cause, because the points they make are not thought about hard enough, and the people on the fence aren't going to be swayed by those points.