Yes they are all the questions that should be asked.
The initial call by the Hispanic teenager was more of a cautionary call. From watching the full videos it appears that information was not sufficiently passed on to the officers who arrived at the scene. That communication process should be looked at to see if it can be improved.
It appears that when police arrived at the scene to investigate, their suspicions were aroused because the guy was on drugs and not making much sense. This hindered their ability to assess the situation. It is understandable that the officers in that situation would wish to keep the man there until they could work out what or if anything was wrong.
Unfortunately it looked like the man was not going to comply and so then it turned physical.
If i am stopped outside my premises by police i would stop and go through the process. I might not be happy but i would accept that the police have to be satisfied that there is not a problem. If i was on drugs and not complying i would expect to be physically restrained.