Here's a Questlove lecture from around five years ago.
This lecture/interview seems to have been recorded around the time The Roots were finishing up their first Def Jam project Game Theory. Quest gives us a very in-depth narrative describing the emergence of the Soulquarians, the inspiration of De La Soul on his decision to pursue making hip hop as a career, J Dilla's works and influence on his thoughts about drumming, and a number of other events and moments that have defined or shaped his music. Quest is the first to admit he is the unofficial the mouthpiece of The Legendary Roots Crew, and with this clip it seems he also serves to translate the energies of a large conglomerate of hip hop and soul artists, including folks like Jay-Z, D'angelo, Cody Chesnutt, Jill Scott, Talib Kweli, and James Poyser.
As for the Red Bull lecture archives (here's the link), the line-up is nothing short of stellar. I could sit here and drop names all night (over 270 clips) but I'll leave it to you to explore them further. I'm off to the Madlib video.
This paper is never going to get done...