I do not know the full back story of why this student was lecturing the teacher, but a few of my thoughts...
1. I think as a general rule our nation (and certainly our school system) treats teens and children as if they are not people and should have unquestioning obedience to all adults and authority figures. Unquestioning obedience is dangerous. I never want my children to have unquestioning obedience to any human. Even adults and authority figures get it wrong sometimes.
2. I also respect should be continually earned. I think we should show elders, teachers, authority figures initial respect. But just because you are an elder/teacher/authority figure doesn't grant you endless respect and give you license to treat those under you as less than. If a cop pulls me over, I'll show him respect. If he comes to my window cussing me or slaps me, well then my respect for him is no longer valid. If a teacher curses at a student, then, sorry, you've lost my respect.
3. His mom is a teacher. My guess is, at his age, he's heard her complain about the system and has picked up on some of that.
4. Sometimes, let's be honest, if you handle a situation in a "respectful manner"...it's just not going to get the job done. Sometimes you do have to make a splash, go overboard, get loud. Even Jesus flipped some tables. Whether or not this young man tried to handle whatever the problem was in a "more respectful" manner before 'going off' on his teacher, I don't know. Handling it in a respectful wouldn't have made it to youtube though and we wouldn't be discussing it here.
5. This young man dropped out and then decided to go back to school. I think it's great he is passionate about his education. Could he have worded things a bit better? Sure. Could he have been less passionate? Maybe, but do want children to be less passionate about their education?
6. If she cursed at him, then...I think that gives him a little more 'right' to loose his temper with her. Especially if his initial question was genuine and respectful (which we will never know if it was or not) And, for a teenage boy, I think he handled himself quite well. Their brains aren't adult brains, impulse control and anger control, etc.
7. What if an adult/parent said the same things to the teacher about their child? In the same tone? Would people consider it just as disrespectful? Or would we applaud the parent for standing up for their child and against the broken educational system?
8. And my big problem with this- the teacher in question, was sitting at her desk, leaned back in her chair, propping her head on her hand and was using a disrespectful tone with the student as well. (rather than an authoritative tone I would expect a teacher to use in a situation like this)
I notice at some point her tone changes a bit, I'm wondering if she noticed the cell phone recording the events?