Ask HN: Searches I don't recognize are appearing in my YouTube search history

Hello HN,

I've tried searching around about this and can't come up with anything. I was hoping someone in this community could have some insight.

Basically there are frequently searches in my YouTube history that I don't recognize. Sometimes in Cyrillic. Example from today:

https://imgur.com/a/E7AyRjh

This has been going on for a few months now. I've tried removing all devices from my Google account. I've also changed my passwords twice. I have 2FA turned on.

Any idea what could be happening here?