I talk about what it costs (in time and money) to make your game moddable by your players.
Videos I reference:
Modding: https://www.youtube.com/watch?v=LH4llMQmJ1E
Arcanum Scripting: https://www.youtube.com/watch?v=coPkWyJIl-M
Design Fallbacks: https://www.youtube.com/watch?v=T7ToTnHj-CI