10 steps to designing a game (video):

https://www.youtube.com/watch?v=9_r7nbVILuM

Considering a game’s flexibility in allowing things like different player counts and play lengths (video):

https://www.youtube.com/watch?v=L1L23mg_SrQ

Different ways games can sequence and resolve players’ actions (video):

https://www.youtube.com/watch?v=AwqHtAOaESI

A six-month plan to getting a board game signed—or at least to giving yourself the best chance at doing so (video):

https://www.youtube.com/watch?v=owQmvruuJGE

7 questions to ask yourself when beginning a game design (video):

https://www.youtube.com/watch?v=1qDoUO67T84

Dispelling myths about game design to get at some hard truths about it (video):

https://www.youtube.com/watch?v=pJ7XertymrQ

Board game designers share their top tips for kids who want to make games (video):

https://www.youtube.com/watch?v=tJ_M96QGGyY