The ABCs of board game design (A-F): quick explanations for common terms used by board game designers (video):

https://www.youtube.com/watch?v=YV1JffFIaO0

Rulebook writing fundamentals: What rulebooks need to achieve and basic concepts for making sure they do (video):

https://www.youtube.com/watch?v=rhOeHsEu3n4

When higher numbers aren’t necessarily better: examples of games where both high and low numbers can be useful depending on the situation (video):

https://www.youtube.com/watch?v=f6TL34Y1zYk

How giving players choices helps them feel engaged in the game’s outcome (video):

https://www.youtube.com/watch?v=3MipF7EGrls

What does a board game licensing contract require the designer to do? Here are some common (and uncommon) terms from publishing contracts (video):

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

Learn your board game jargon: what are mechanisms, drafting, and polyominoes? (video):

https://www.youtube.com/watch?v=IAvP5cAQw9Y