It might have in Nashville - where this teacher was dismissed after students caught him raging in the classroom on video. Students catching teachers doing [insert bad thing here] on YouTube happens all the time. Just go to YouTube and search. I think you will be surprised.
But, harder question, is this good for our classrooms? Openness is generally a good thing, so hard to find much fault in it, understandably. But, sometimes the actions that are needed for students are actions that do not come off well in video. I'll remind you that corporeal punishment is still legal in a large number of states. That is not going to come off well on video even though legislatures still consider it an appropriate disciplinary tool.
The classroom in Nashville was clearly out of control and students were not showing the proper deference to the teacher. Now, a good teacher would not let it get to that point and would have better ideas for resolving that situation than flipping over desks. But, to think all of our teachers are going to know what to do when presented with that situation is naive. There are over 3 million teachers in the U.S. ... but there are certainly over 3 million smart phones in the classroom right now. Thus, there is a high potential that each teacher might be recorded at some point ... that point being their lowest more often than not. Thus, teachers are much less likely to reach those low points. Is that good? Probably, but let's also acknowledge that lowpoints are not necessarily bad points in a teacher's career. A low point can be a great learning experience for both the teacher and the students if handled properly. Specifically, those low points can frequently show students just where the boundaries of that classroom lie and, sometimes, students will at least respect that point.
As you can see, I'm not real sure of my thoughts on this one, so I'd be happy to hear yours.