Video format to get my comp to export under 50Kb I have an approx. 8s long video in Adobe After Effects CC, res. 200x200px. I need to export it so it has &lt;= 50Kb, which format should I choose so it keeps the most quality but falls under these constraints?

-> here is the .pdf, but it's in Czech. The relevant info is translated lower:
->

format   size (px)  kB   length (s)

Square   200x200    50   unconstrained
After reviewing the PDF, I can confirm that you are misreading it.  They are looking for a flash animation, not a video.  You will not be able to use your After Effects assets at all.  You need to remake the ad as a flash animation in Adobe Flash using vector graphics in order to fit within their 50KB limitation.