You can turn on the 'Run only in top frame' option of the script from its settings page or add '// @noframes' at top.
This isn't supposed to happen and I've tested it and doesn't happen for me, do you have the link of a sample page where this occurs?
I am glad to know how Tampermonkey can be used, thank you.
But there is still a small problem (maybe only me), I updated from ver2.05 to 2.09, the rounded corners of the edges seem to be displayed abnormally. (Maybe i don't care.)
Autoplay bothers me a lot. As long as there are multiple youtube videos on any webpage,
they will automatically play together (for example, some news sites),
which makes my CPU soar or the volume is noisy.
I can cancel the autoplay or set a switch (command )?
※This symptom occurs after installing this script.