The problem is, Nobody knows all the laws.. so there's going to be quite a bit of blurring in these situations.
This grey area is what the youtubers exploit to make these "that cop sucks" videos.
For the video-poster, it grants them the external recognition of their existence and ego.
For the police, it's extra work that did not need to be done, which is why they're always unhappy to do it, and could get short on temper..
The police are generally good people with a job to do...
The Youtube video posters on the other hand, are no different than Off brand TMZ...
So the argument invariable comes down to "who is MORE wrong"
I would say the start of the incident is more along the side of the youtuber, than the police officer...
The youtuber PURPOSELY sought for a reactionary response on part of the police..