Good Night, Little Ones! (2000)

"Good Night, Little Ones!" is a Russian-language children's show created by Alexander Tatarsky & Eduard Uspensky that was first aired in 1964. This listing in particular is for Yuri Norstein's sequence that he created to air before/after each episode (which only ran for a year from 2000-2001 before it was discontinued due to being "too dark" for child audiences). Norstein stated that it took 1.5 years to hand-draw and animate this sequence

Unfortunately the movie Good Night, Little Ones! is not yet available on HBO Max.