Along with the nvidia-settings and nvidia-prime packages, this tool used to work perfectly with my laptop's discrete GeForce 940MX 3D adapter. It enabled GPU encoding/decoding in any video application such as VLC or Shotcut. Alas! Something is broken now and I can't install it on LM 20.2 anymore -- the package is flagged as "unavailable" in the Software Manager app. :-(
If you're trying to compile anything with this and find it is incompatible with gcc - that's because the version here on the repos is outdated.