Ok I found a way to do the pre viz sharper and yet good to upload as size by not up scaling my video but downscaling the size of the composition settings in AE. This is just a pre viz after all. So here are my two scenes (I will add the third one soon). It is 1m 53s which is not bad and shows quite a lot. The transition isn't perfect but it shows the main idea. This of course will be developed later.