The original video is from the 2012 Burnett Lecture located here. This is the very end of the 2nd vidoe right before the Q&A

http://learningcenter.unc.edu/ldadhd-...

The playlist for the entire lecture and Q&A is located here
   • 2012 Burnett Lecture Part 1 Keynote S...  

This video is from the end of Part 2.

The powerpoint slides are located here
http://learningcenter.unc.edu/files/2...

Dr. Barkley has far more info on this subject and more lectures on his website located here
http://adhdlectures.com/