obs-gstreamer VS virtual_webcam_background

I'd recommend you to look for obs-vaapi and obs-gstreamer as plugins to utilize GPU encoding on OBS. On Flatpak they're available as OBS plugins you can install alongside the Flatpak version of OBS.

I wanted to start experimenting with GPU recording on my Ubuntu machine and saw this video from GloriousEggroll demonstrating VAAPI working better than ever using the obs-gstreamer plugin, which would now be the standalone obs-vaapi plugin. I'm running Ubuntu 22.10 and the latest stable version of OBS from the ppa. As instructed, I checked the VAAPI version on my system with vainfo, got this.

On Nvidia you'd use obs-gstreamer (it's the same but obs-vaapi has only the vaapi part, not the entire implementation) because vaapi isn't supported by Nvidia.

Plus, since my Crysis 3 gameplay I'm using obs-gstreamer which fixed the crappy ffmpeg performance while recording with hardware encoding.

Try obs-gstreamer plugin... I'll write the easy way tomorrow if you don't know how to compile and install it, but if you can read then it's fine

Use obs-gstreamer https://github.com/fzwoch/obs-gstreamer

The video description is a bit misleading. You need this OBS plugin in addition to installing gstreamer-vaapi.

I've been using https://github.com/allo-/virtual_webcam_background

There are many others similar to the above. They all basically work by using the v4l2loopback driver to create a loopback video device. Then you have the program consume video from the real webcam video device, apply a deep learning model that subtracts the background and replaces it with an image or video of your choice, and outputs the vide to the loopback device. Then you configure your video conferencing software (zoom, teams, webex, whatever) to use the loopback device instead of the real one.