I think they follow the list of registered to participate in the competition. If the number of applicants exceeds the possible budget, they can close the reception of new videos
I like that all participants will receive guaranteed prizes. And the participant with the most views will get the opportunity to win $ 1,500
If the contest participants contribute to the development of the project, then they should receive a guaranteed fee.
$ 25 is good pay for 1 video, but the best will get $ 1,500