>>2157okay heres what you do faget
1)download one of these
http://www.xmedia-recode.de/download.html2)install
3)open software its called xmedia recode
set output format to webm
4)click open file select your video select filters and preview tab you can edit the video length and stuff here if you want
5)go to queue next to custom set to ten
6)click the video tab select codec set to vp9 press the blue box next to variable bit rate make sure the file is below 8 mb shown on the green bar adjust file and % of media size then hit ok
7)set cpus used to the amount of cpus you have to maximise render speed
8) hit add to at the top bar then hit encode and itll render it it should appear in videos by default
aaaaaand hey presto webm