There are loads of AI nursery rhymes already on youtube, with weird computerised voices and slightly altered lyrics (for copyright reasons?)
Yeah, it's gross and I wouldn't want my kid to watch it... but the alternative is equally disgusting, like those weird kids' shows on youtube with real actors, but all the actors do is unbox toys or receive piles of candy.
I'm not giving parenting advice here, but if you need to entertain a toddler with video (for whatever reason) your local public broadcaster probably has a dedicated channel. While it won't be a substitute for real parenting, a public broadcaster tends to be held to a higher standard than internet video, and typically has fewer (or zero) ads. Examples include CBeebies (BBC for kids) and ABC Kids (Australia). I'm guessing there are equivalents in the USA and Canada?