I've been asked privately about the white kid who videoed this episode not being instructed to sit down or leave.
Contemporary police training has spent considerable time addressing the growing and popular practice of common citizens (i.e., not credentialed photo journalists) videoing just about anything and everything, including policing activity. The commonness of this practice together with training has led police officers to be less concerned with people taking video. That is to say, videographers are, these days, less apt to be viewed as an interference or threat (in a melee a camera could be mistaken as a weapon). To the contrary, though someone holding an object in their hand at an incident is going to get the attention of a well-trained police officer, once an officer realizes the person is videoing he/she understands the action of that person and does not view it as a threat or as interference so long as they keep themselves from whatever fray it is they're recording and do not otherwise make movements that could raise alarm.
The kid who videoed this thing says something to the effect that to the police it was like he wasn't even there because he was not instructed to sit down or leave. Because this kid is white, to him this suggested racial bias. Though his assessment is a possibility, it is not the only one. An alternative is that the officers recognized his presence and what he was doing and that it represented no threat or interference, and possibly that he did not remotely fit any profile of subjects reportedly involved in a violent exchange. He was not roaming around getting in anyone's way. He stayed out of the way. If he wasn't viewed as causing interference then he was left to keep doing what he was doing, which was standing out of the way and filming.
