I think you're probably right, and that without cell phones these kind of incidents would continue to be swept under the rug.
Black Lives Matter was a movement founded on an incident which proved to be a hoax. That doesn't mean that there aren't other incidents that prove their point.
So you’re suggesting that race was the motivation?
Their “point” is invalid; there is no “epidemic” of police unjustifiably killing black people. Not even close. #BLM doesn’t even bring up valid isolated cases, they hype cases where cops are justified! That’s because what they’re really about is running massive interference for the black criminal subculture.
Despite the true epidemic being black violent crime, blacks are actually LESS likely to be shot by police than whites! Yet the lies grow and spread.