The S shortcut duplicates the YouTube video rotate function. How can I change the shortcut key?

Hi there, when I use the S shortcut and try to repeat a single sentence, the video appears to rotate, which seems to duplicate the YouTube shortcut. Is there a way I can change the S shortcut? The downward shortcut doesn’t work either - when I press it, the volume goes down. I’m not sure what to do, but clicking on the screen works fine. However, I think a shortcut would be more convenient. Of course, if we could develop a button that repeats a sentence with one click, and then stops it with another click, I think that would be great! I’m really looking forward to that.