This video was originally posted in two parts to Twitter. Here's what the person recording had to say about it:

A former law enforcement officer who saw the clip also weighed in on the matter:

I would love to know the full story here. I used to be law enforcement and can’t think of one reason why he wouldn’t be told why he’s being detained. Even the way the “cop” is holding him against the wall is odd and not standard. Also don’t understand 20 of them tackling him

— AList (@alistlk) March 5, 2020