In the video were Dungeons & Dragons senior manager for the Dungeons & Dragons research and design team Mike Mearls, Greg Bilsland, a producer for Dungeons & Dragons at Wizards of the Coast, and Trevor Kidd ("seen" only as an occasional set of hands in the video), Community Manager for Dungeons & Dragons.
You can watch the video yourself here:
[youtube]https://www.youtube.com/watch?v=L9pBZTyQ-iA[/youtube]
The video[...]