>>14952852the "vf=blah blah blah" part of the command is a "green screen" filter except you tell it what color "green" is. if you tell it to be 10 times less aggressive with what it considers "white"
change the 0.1's to 0.01 then you get this. the compression artifacts
blockiness from the original WEBM interfere with it.
>>14951875it might actually work pretty well if you know where it's clipped from - or if you're willing to do more than the lazy job I just did. sleep now. 