Guessin this is about submitting for the trailer? All clips in the 2022 trailer were cut down to 10 seconds, they prolly want 15 seconds just in case they spot something they need to cut out, makes editing it all a bit easier for them. Concidering there will be like hundred+ clips to show and how the video with all the trailers will prolly be like 20-30 minute long even if each game is only 10 seconds, yeeeaah they aren't gonna show a minute of footage for anyone. Tho you can always add your own longer trailer to your booth for people to check out, and that can ofcourse be as long as you want it to be.