Feels like one of those staged rescue animals posts.
That was an awkward start and wild kittens may not waddle up to a human. They may have been previously aquiinted.
Mama cats do forget babies from thier litter as they move between nests. This is why the kittens meow so loud.
Considering the massive street and no hidey holes nearby mama cat could've died on the street and the rest are goners...
Or this is staged crap posted by a user on YouTube called KittySOS who appears to repost rescue videos.
I will say this one feels a bit real due to the extended documentation of healing. Calling it even on this one. Lost kitty mom forgot as she was moving nests. Found a nice hooman. Adopted the hooman.