The web is full of video lectures these days but, try as I might, I can find very little for Introduction to Group Theory. The closest I found was http://www.extension.harvard.edu/open-learning-initiative/abstract-algebra . Are they any online introductory group theory lectures people would recommend?
http://www.youtube.com/user/LadislauFernandes Has uploaded quite a few videos on introductory group theory.
I have not watched that much of any of them though, so I can't say much about the quality (the bit I have watched seemed ok. A bit slow, but that might just be because this is not new stuff to me).
These are some excellent videos by Harvard professor Benedict Gross. They are not specifically about group theory but they do cover group theory to certain extent.
Have you checked out out any of Ben Garside's over a hundred videos? They're pretty detailed.
Check this Link :
Not specially for group theory but Group theory relevant stuffs also there.
I have recently found this crash course in group theory online. It is basically a good summary for anyone interested in learning the very basics (and it could potentially save the lives of students with bad lecturers) or for reviewing them before going into something a little more deep.
Also, try Professor Macauley's series on Group Theory. He explains things in a bit of detail, with examples and proofs, so the lessons are a bit too long for my taste, but they're actually quite good, specially if you're seeing the stuff for the first time.