If you have any interest in WebGL (1), I've been publishing screencasts on YouTube for a while now- I'm up to nearly 100.
The playlist for WebGL is https://www.youtube.com/playlist?list=PLPqKsyEGhUnaOdIFLKvdk...
I'm also covering 3D Math fundamentals now.
My channel https://www.youtube.com/user/iamdavidwparker