Thoughts on branching paths in narrative and campaign-style tabletop games (video):

https://www.youtube.com/watch?v=aJFBVhlh-Pw

Half a dozen board game designers discuss all the various steps of making a game (video):

https://www.youtube.com/watch?v=qG3oX9H8RAo

A rundown of various action systems that give players interesting ways of deciding what to do on their turn (video):

https://www.youtube.com/watch?v=Uca3LzGMe1Q