For those of you who couldn't make it to GRCo15, we recorded the videos this year. And thanks to Jose Loera, we've got them ready and available in a timely manner. You can use the Agenda page to find any talk you're interested in and click to get more information. There is a "Presentations" link for every talk that links to YouTube for every video.
http://www.trondeau.com/grcon15-agenda/
Hope everyone finds these useful.
And another big thanks to Jose for getting these together so nicely.
Tom