I don't think YouTube can be sued for something like that. There is a ton of bad advice in, I would guess, hundreds of thousands of videos that could cause harm.
I think when YouTube goes into filtering content then that should increase their liability if something they didn't filter out results in harm. At that point they are telling us that they are taking out bad content, that could imply the content they didn't remove is safe.
I know a lot of this was debated when Facebook was giving depositions to Congress and they were debating if these social media sites are platforms or publishers.