INFO means it’s not even a warning.
OpenCV has, or is in the process of gaining, a kind of runtime dispatch for some of its backends (highgui, videoio). What you’re seeing is its thought process. It will look for stuff that might be available, and if it isn’t, that’s fine.
I think you can modulate the verbosity of this. I don’t know off the top of my head.
specifics please.
potentially related: https://stackoverflow.com/staging-ground/79192142