Just saw the notification for this in my Youtube Studio. For now it seems as if this setting is turned off by default, but for anyone like myself who uploads videos to Youtube, I recommend checking that they don't decide to toggle this on for you in the future.
Me: "I should upload a series of daily videos where I speak exclusively jibberish, while doing insane movements/"dances"
"USHNXMBXSGJLOCXRH OJCSSIKBFHHFDUKFSYKM TKJFSTJVDDJVCDIBCF"
meanwhile doing hip thrusts and cartwheels simutaniously while my neighbor below bangs on their ceiling with a broom