[KenWittlief]

I would guess that maybe FIRST wants teams to spend their limited time and energy on things that earn you a chairmans award, instead of spending many hours putting together a video about why you think you have earned a chairmans award

maybe?

the submission is really just talking about what you have done

this might be their way of saying, spend more time doing, less time talking about it?

or I could be full of beans! :^)