June 2010, Calfornia.
TUG 2010: TeX's 25th anniversary included a talk by Prof Donald Knuth on the design features of the next version of Tex which he is working on. Spiced with his characteristic sparks of humour, this is a must-see video for all TeX/LatEx lovers ::
The video runs for 33.43 minutes and comes as a 87.7 MB file in mp4 format.
PS I have downloaded the above file and can send it to genuine TeX/LaTeX practitioners (you bear the postage and copying costs)