I find it difficult to believe that any rational person would think all of the facts regarding the incident were to be found in a cell phone video posted to social media. I don't have similar hesitations believing that an irrational person would however.  What the officer did was in no way incorrect given the behavior of the drunk belligerent he was dealing with that night.  That is why, as the lyrics in Gretchen Wilson's song proclaim, you don't start no stuff in no bar when you're all jacked up.  It's not going to end well for you when you do and you will ultimately have no one to blame but yourself for anything that happens to you while you are drunk and belligerent.