There aren't categories that you are missing, but at the same time i would be opposed to adding them since we already have too many categories for the active base of runners.
Depending on your internet connection you could theoretically live stream from your ps4 to twitch. That would firstly result in a better video quality and secondly give you a recording (past broadcast archive). If several clips or bad quality recording would be accepted is a question for the moderators (superSANIC).
Just putting my thoughts out there - depending if you want to really differentiate the leaderboard on difficulty or not you might aswell "just" do a dropdown for the difficulties and only have the normal New Game and New Game + categories. That would leave the difficulty at the runners digression. I.e. Minecraft Java Edition did a similar thing for their random seed category where the difficulty doesnt really matter for the category so its just a dropdown on the run submission.