For those interested, my keynote from ISTA Conference 2015 in Sofia, Bulgaria, is live now on YouTube!
This keynote meant a lot to me. It was my first one, which was nerve-wracking, plus the organizers were kind enough to give me free rein to do a somewhat quirky format. I wanted badly to do a shorter keynote, and specifically stay away from the hour-long breakout-session-disguised-as-a-keynote format.
My topic for the talk was "Why?" which is a question we don't ask anywhere near enough. The talk's just under 30 minutes, so it's an easy to watch/listen to chunk.
I hope you'll find it interesting.