Intel Iris Graphics and VA-API
Check currently installed drivers:
$ wajig list-installed | grep intel-media intel-media-va-driver:amd64 intel-media-va-driver:i386
Install the non-free driver:
sudo apt install intel-media-va-driver-non-free
Mission: Get good OBS recording output on my TUXEDO InfinityBook S 14 - Gen6.
To use VAAPI in OBS follow these steps:
File > Settings > Output
Output Mode: Advanced
Encoder: FFMPEG VAAPI
This of course presumes that a the encoder is present, but on my system it was not. Thus I had to install non free software.