You might already have that stuff installed. The reason I say that is this:

• cannot install both mpv-libs-0.39.0-1.fc41.x86_64 from fedora and mpv-libs-1:0.39.0-1.fc41.x86_64 from @System

Did you try installing the RPM by itself and see if it works?

ETA: layering can be a good option, but if the base system already has the files you’re trying to install but a different version, you’ll sometimes run into funky behavior. I think you have to include an override --force if you want to replace something already installed.

And since you’re just trying to install a music program, that seems a little invasive for what you’re trying to do and might introduce bugs during future updates. I don’t recommend you bother trying to replace system packages.