There is a long cultural, legal and policy history that led to black communities being in the condition they are in now. We're asking a community to behave while they are and have been disenfranchised for hundreds of years via social contracts, laws, Supreme Court decisions, etc. The emotions in videos like these are a response to another in a long line of systemic racist problems in the US. From neoslavery, Jim Crow, the drug war, the prison industrial complex "One third of black males will spend time in prison, 3 times more likely than whites to be arrested for selling drugs even though they aren't more likely to sell them. Violent/property arrests of blacks have fallen but drug arrests have soared.", modern racist voting rights violations (1,2), etc. the post-slavery struggle has been significant. Throughout this struggle the white community has told the black community to stop acting out and act like "civilized" citizens, while simultaneously disenfranchising them and treating them in uncivilized manners, often as non-citizens. This is a classic, definitive element of racism in the US, evident throughout its history. "The entitled black should look to taking care of their own neighborhoods filled with violent thugs who can't pull themselves out of their self-made ghettos." It's disgusting to see these same tropes fill posts like this day after day. Things have improved but system racism persists.

We ask "how can these strangers in Youtube videos say racist things about white people". We're outraged when we see videos of ordinary people at their wits end expressing anger and hate. Meanwhile Republican candidates for president says racist, hateful things out loud all the time and are applauded for it by sections of the population. There is a rich history of politicians saying these and much worse things. And, more importantly, active disenfranchisement of blacks continues in the manners described above via voting rights violations, mass incarceration via discriminatory drug laws, etc, with progress stymied by those who refuse to recognize history and act.