Poignant video.

The cameraperson or another bystander should have called 911. Asked for ambulance (and maybe fire dept) to attend. In addition to medical care, that would at least get some higher degree of paperwork going from an accountability perspective.

Definitely a disturbing abuse of power, but it's LAPD. Where's the connection to Republicans?

"Blue lives" flags are intensely fascist, unpatriotic symbology and an explicit desecration of the American flag, that might be a good place to start your research.

State-sanctioned organized crime by white supremacist terrorists, that's the connection with Republicans. They pardoned the insurrectionists that violently captured the capital building and pay off murderers whose crimes achieve their political goals. It's mostly happening out in the open, brazenly. We're not rational machines, we're easily manipulated and it takes less energy to settle into beliefs others want us to have. "Flood the zone" works but reality is still happening.

So... I come from a country where police are still mostly respected. They also don't use rubber bullets usually.

From my point of view, this person was disobeying orders from police, which gives them the right to use force. Is a rubber bullet an appropriate amount of force? Probably not, but I don't see this video as a completely one sided interaction with one party being wrong.

Please explain, because I was probably watching a different video than you.