Bingo! That's the problem. People are making "judgement calls" based on highly publicized, recent cases of police officers doing "unreasonable things". Those cases represent < 0.1% of the police officers in the country. Making judgement calls based on what others have done is called prejudice, and last I checked, people are still innocent until proven guilty in this country. That goes for the reporters and the officers involved.

As for the amount of context we have relative to the video that's been published, I think any reasonable judge would conclude that (1) the person operating the camera was almost certainly recording before what we've seen published, (2) the events on published video obviously seem to refer to events that happened before what we see, and (3) those events that happened before are not just circumstantial details - they could easily swing the case in either direction. So yes, more context in this situation is absolutely necessary. Make no confusion - I'm not asking about what they ate for breakfast.