We went through this with our daughter[1]. I used to laugh at all the incredibly poorly targeted ads that'd show up in the middle of the ABC's song for like car

We went through this with our daughter[1]. I used to laugh at all the incredibly poorly targeted ads that'd show up in the middle of the ABC's song for like car insurance or whatnot. But that was mostly an annoyance. What's more dangerous, IMHO, was the tendency for YouTube to queue up stuff that's increasingly dubious. So, you might start out with something that was high quality (see note below) but up next would be some weird apparently mass produced garbage with like people opening easter eggs, and it'd drift off from there. You really have to work to curate your own youtube content, and they don't make it easy. [1] Incidentally, Super Simple Songs was our favorite. High quality, clever, instructional videos that we felt good about letter her watch.