In recent years, it's become increasingly popular to film encounters with bad behavior or injustice. It's a great trend overall, because video proof documenting what happened during an encounter helps to provide clear, unbiased evidence to peers. Video documentation is useful for getting fair justice in court, and out of court it's still pretty good for showing other people what really happened during a conflict.
More and more people are being held accountable, or are being let off the hook fairly, because they've captured video footage that tells the whole story. There has also been a rise in another peculiar phenomenon, though: people accidentally incriminating themselves by filming their own crimes and putting the videos online.
This is one of those occasions.
WARNING: video contains profane language