Mentioned here as a question, but wanted to post as an idea in hopes it gets noticed again.
Very simple, just the ability to set what static frame a video sits on while on the canvas. This is an option for GIF fills already, so it makes a lot of sense to make this possible for video fills as well.
I’m 99% of the way to switching from Keynote to Figma for presenting ideas, but this is the one feature that’s keeping me in Keynote.