Because of cases like this, I believe you should start making quick replies to the authors of rejected uploads. Nothing fancy, just something like "Production quality should be better, the teaching is too fuzzy, the effect is already published, this is just a variation, etc"... I'm planning to film something until the end of the month and although I'm pretty sure that the value of the effect is big and that the price will be ridiculous, if I somehow get rejected I sure would like to know why in one or two brief sentences. I know you probably get many submissions daily, but how much of your time could that take? This is just a thought, of course.