Sadly this userscript doesn't account for normalized audio. Try opening for example https://www.youtube.com/watch?v=XVIsijUM_NE with this userscript enabled and logging enabled, you'll see that it brings the video maximum volume of 0.39 to 0.06 which is obviously not ideal. Also please enable YouTube by default, it works otherwise flawlessly.
Sadly this userscript doesn't account for normalized audio. Try opening for example https://www.youtube.com/watch?v=XVIsijUM_NE with this userscript enabled and logging enabled, you'll see that it brings the video maximum volume of 0.39 to 0.06 which is obviously not ideal. Also please enable YouTube by default, it works otherwise flawlessly.