It's unfortunate, but the GP will probably see these videos and feel vindicated in their belief that these cops are acting righteously, purely in self-defense. It works for both sides of the coin, but when presented with conflicting evidence people often double down on their beliefs. (e.g. Statements like "These videos prove that there are no systemic factors at play, this is pure self-defense. It's just a coincidence that these people are all black.")