Re: legal/not legal - you didn't initially say you owned copies of the dvd. That does make a difference. Personal use is likely not as important in this case as the classroom assignment aspect. As long as you're doing this for an assignment, you're probably OK without obtaining specific permission - IF you limit the total excerpts to not more than 10%, maximim 3 minutes. That's not 3 minutes per episode, that's 3 minutes total.
Once the presentation leaves the classroom, all bets are off. Different standards apply.
No, I'm not a copyright lawyer and I didn't sleep in a Holiday Inn Express last night. :smile: But I do work with students on a farily regular basis on this topic and have had reason to actually read, study and help interpret the CONFU guidelines. (If you have insomnia, that reading might just cure it!)
Good luck with the presentation.