Digital Tutors is fantastic. With thousands of high quality video tutorials, it is the best place for learning how to make computer graphics and digital art. It does not have much tutorials for any game engines other than Unity3D, but that is balanced by the fact that there are over a thousand tuts for Autodesk Maya alone. Tutorial files are also available.
One thing I really like about DT is that they don’t host their videos on sites like YouTube or Vimeo or whatever. They have the videos on their own site, digitaltutors.com. The videos are optionally full screen.
The cost? Well, you can watch some for free; in fact, there are whole courses that are free. But with a paid subscription, you can watch them all.
Overall, I think http://www.digitaltutors.com is one of the best sites I’ve stumbled across in a long time. Five stars.