You're not meant to post anything like that on the internet without consent. I reality I don't know if you would get caught or not and if you did if the teacher would do anything. If there is a good reason your doing it they probably wont mind if you ask them, but if you ask them and they say no you really shouldnt go ahead and do it then.
Wouldn't do it for a start. I mean, imagine asking your teacher could you film their lessons and put it on the net simply for others? Get a grip, as if you're not looking to charge access to the files - if you weren't, we wouldn't you just ask them?
Legally you can, IF his classes arent copyrighted.
I've had teachers who's notes etc are copyrighted.
U try to share his lessons if they copyright and you could get done for infringement and the penalties for that are surprisingly nasty.
But more than likely he hasnt done so, and in that case, you can! But it might piss him off a bit..
A while back, here at uni, someone put some lecturers material up on the web, and he got into BIIIIGGGG trouble for it! Wouldn't advise it!
Im sure its Voyeurism! But, with the teachers consent, and maybe only audio, it should be ok. Without consent and knowledge though, its either Voyeurism or invasion of privacy!
It's a bad idea, for all the reasons listed above, and a more practical one; people will not appreciate a poor quality recording with the teacher turning his/her back, ums, ers, pauses, mumbles, bells, coughs, sniffs, sounds of chairs and paper and so on.
Students, especially at this time of year, want well-organised condensed notes in a form they can refer to and navigate through. Preferably print-friendly, so they can be run off and highlighted and annotated.