Rules have been updated to have more clear wording. This does not affect the actual requirements for any categories; the changes only serve to make the requirements for timing and differences between categories more clear. If something still doesn't make sense, let me know and I'll look into it.

Edit: I also have removed the requirement for videos to be included with submissions. On a case by case basis (particularly if the run is 50% or so longer than the top runs in that category), runs may be accepted without video submissions. No 1st place run will ever be accepted without video, however.