Cardboard Edison Award judge Pam Walls offers insights into the judging process and tips for what to do before submitting your game (video):

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

Lots of things publishers can do to make players’ lives easier: player aids, rulebook organization, FAQs, and more (video):

https://www.youtube.com/watch?v=p4lc7jOFySA

Giving and receiving playtest feedback with kindness (video):

https://www.youtube.com/watch?v=lNqf5NtTxyA

Starting and maintaining a playtesting community (video):

https://www.youtube.com/watch?v=UqIct19BIOI

Best practices for taking notes during a playtest (video):

https://www.youtube.com/watch?v=U_mEqtv129k

Tips for iterating on your board game idea to improve it over time (video):

https://www.youtube.com/watch?v=Bomd3kPGj0U

Graphic design tips for improving your board game prototype’s layout and user experience (video):

https://www.youtube.com/watch?v=_hnuJZ-DVEs

Lots of pointers for getting the most out of a playtesting event (video):

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

Lessons learned from working in board games: the game design process, knowing your values and priorities, co-designing, attending conventions, and more (video):

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

“It’s okay to create without publishing as the goal. Game making can be similar to getting into crochet, illustration, or other crafts. It’s beautiful to make things for the sake of it, and realize games are no different from anything else.”
— Marceline Leiman

Materials and tools for making cards for your board game prototype (video):

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