Awww. . . too cute!
If it doesn't play outside the U.S., you might search "hungry hippo kitten."
It plays, but very jerkily.
The hosting site plays it better.
Have you ever seen a kitten wiggle its ears like that?
Kittens ears are actually quite floppy - especially one that young - so the suckling action would be enough to make them wiggle. It does look rather cute though.
I once tried to rescue a litter of kittens abandoned by their mother on a farm I was living on. The clip took me back.
Thought it might be nerves