The copy I linked is clearly a re-upload of a re-upload, it was just the first copy I found.
How do we know anything is real at all? I don't have a specific chain of custody for the video, but I judge that it's likely true because the practices shown are consistent with other reports (e.g. https://www.youtube.com/watch?v=M8PgCUap1Vg, https://www.hrw.org/report/2015/05/13/tiger-chairs-and-cell-...). It gets other details right, like the anti-motorcycle crackdown. Also, the low-level Chinese police that would create a video like that very likely do not understand how bad the optics of it are when seen by foreigners.
> Do you have a source for this? I find it hard to find information on this, I assume it's because I don't speak Chinese.
https://en.wikipedia.org/wiki/WeChat#State_surveillance_and_.... It wasn't hard to find.