We can't just say "I don't condone violence!" I don't like violence either, because it escalates. But Black people have a right to defend themselves and others.
If one of the drunk white people had a gun on that boat, this would have been a very different outcome. The woman that was struck by the chair could have had a very bad outcome. Etc.
Even as it stands, several of the Black men in that video will now be Black, in Alabama, with a criminal record. That's bad. And now they can't even vote.