GET YOUR STUFF TOGETHER!

I tried cropping my video into square, but it said "Failed - cant decode" (it was an mp4 video by the way), so if its only a problem for me, fix it somehow, i dont know. if its just that you guys dont accept mp4, FIX THAT.

Bertha Oksana Britney Nicki about Video Crop - Remove unwanted areas!, v2.5