These are the Command Line Encoder Settings if you need to copy paste them:
Video Codec: libvpx-vp9
Audio Codec: libvorbis
Output File Extension: mkv
Encode Settings Low: -crf 28 -b:v 0
Encode Settings Med: -crf 23 -b:v 0
Encode Settings High: -crf 20 -b:v 0
Encode Settings Epic: -crf 16 -b:v 0