>>29260693
Webmgenerator
https://github.com/dfaker/WebmGenerator
project of a /gif/ poster in 2020. Just drag a video onto the exe. Far more respectful of your time than most editors and one-handed workflow make it my first choice for this hellhole. Vegas if I need something more professional. Haven't bothered making a script for ffmpeg in years.

>>29260693
>Is it possible to make a 30–50 second high-quality webm under 4 MB?
not reliably. VP9 is alright but 4MB just isn't much to work with.