It changed mine and my wifes perspective last night so I linked it on Facebook and loads have changed their view.
This footage should have been released immediately.
The thing is, in the original thread, without needing to look at the footage (which wasn't available), there was still reporting available detailing aspects of it - namely via the lawyers of one of the officers IIRC (sadly that thread was disappeared rather than simply being locked because some people get overly emotive at others having different opinions so we can't look back at it).
But that he was saying "I can't breathe" and dropped to the floor when they first tried to put him in the cop car was described/known before the full footage was leaked by the Daily Mail and IIRC I pointed it out.
It seems having the actual footage is a heck of a lot more powerful for changing people's minds on this. Not too surprising they only wanted select clips released to the media.