I just bought 4 videos from the Cakewalk store this month (three by Karl Rove. Thanks fastbikerboy,) and SONAR X3 Explained came free with my X3 upgrade.
I have both of Craig Anderton's Advanced Workshop videos. They both are helpful, and we are lucky to have Mr. Anderton making presentations for us using the SONAR environment. Thank you for doing helpful things for us SONAR users throughout the years! Having more professionals doing the same is a good thing for the SONAR community.
The Groove3 tutorials are helpful videos, indeed.
I really like Eli Krantzberg's SONAR related videos. He is extremely good at teaching how to use SONAR and knowledgeable about music production related things in general. He also has other well done videos, such as Music Theory Explained, and MIDI Orchestration Explained. I wish he would cover more of these music production related topics using SONAR, though, since I'm more familiar with it (but there may be more tips and tricks or functionality he can reveal I'm not aware of), and it is my DAW of choice.
I can't overstate how impressed and pleased I am with Eli's tutorials/videos. If this was a university, and I was a student, again, he would certainly be my favorite professor! Come on Eli! ... uh Mr. Kranzberg....Give us some more videos using SONAR? And may you prosper and be in good health.