Hi. Last year ‘ArtistWorks’ began a video tutorial lesson site that includes lessons from Billy Cobham & Thomas Lang. I believe that there is a fee for these, but the lessons include being able to communicate w/ the instructors themselves by recording a video of yourself playing & then recieving a recorded response from Cobham and/or Lang commenting on your progress.
Personally, I have always chosen drumming instructional/educational DVDs over online lesson videos, so I’m really not aware of any other sites offhand. I dknow that sometimes drum & cymbal companies offer artist lessons on their sites, as well. Good luck in finding one that works for you.