Long form nature videos

My 1.5 year old daughter LOVES nature videos (think videos of horses, dolphins, whales, etc.) she also loves watching the birds and frogs and other animals outside. Are there any long form nature videos that are appropriate for toddlers? Please not too attention demanding, I want to be able to put them on and then if her attention wanders I don’t want her dragged back in. Also YouTube preferred.

Honestly? Considering just using “Cat TV” videos.