The Board Game Workshop has just announced their 2021 contest. This year, they are stratifying their competition between three categories of Light, Medium, and Heavy (designers themselves choose the categories for their submissions). There's also an online speed-pitching segment as part of the third round.
A sub-2-minute video is due for each submission, as well as at least one image, sell sheet, and short description. Multiple entries from one designer are permitted. Registration costs $10 (I assume this cost is per submission, even for the same designer).
Entry is open 16th May, 2021, and closes 13th June, 2021.
All details here:
https://theboardgameworkshop.com/2021-design-contest/