I spent about an hour with google, installing opengl analyzers, etc.
Not sure this warrants a bugreport, but simply improving the error message would go a long way.
Here's the error:
Your video card driver does not support any of the supported OpenGL versions.
Please update your drivers or if you have a very old or integrated GPU upgrade it.
I couldn't figure out what was wrong since I'm running OpenGL 3.1:
Renderer: Intel(R) HD Graphics 2000
Version: 3.1.0 - Build 188.8.131.5259
OBS works fine on this machine.
Fortunately I finally found this reply to someone else's post (but theirs didn't exactly quote the error message):
Project > Project Settings > Rendering > Quality > Driver >Driver name: GLES2
answered Jul 25, 2020 by aerson (24 points)