There's a guy who films all the bands at a club we play. He uses professional gear and turns out a pretty good video. He also give the bands approval, which is unique. Unfortunately he always sets up in front of the guitarist which means the bass is always in the background.
I also know a band who had a "melt down" on stage and had to ask anyone filming not to put it on the internet!
I barely get through a song without doing something I'd rather forget, let alone a whole night, so I'm ambivalent about these videos. On the other hand, they show you what the audience sees and hears, so they can be a useful learning tool.