The Sims reference (https://youtu.be/6-v1b9waHWY?t=112) was slightly anachronistic since it was released in early 2000 (and it's really weird to see the idealized hires vector graphics reto-re-rendering of a lores pixelated game), but the dancing baby was spot on.
The dancing baby (https://youtu.be/6-v1b9waHWY?t=124) was from a demo that shipped with 3D Studio Max's "Character Studio / Bipid / Physique" character animation and skinning system, which we used to make the character animation in The Sims. The baby and its dancing animations were included with Character Studio as a canned demo, along with some other animations you could apply to any skeleton.
The dancing baby (https://youtu.be/6-v1b9waHWY?t=124) was from a demo that shipped with 3D Studio Max's "Character Studio / Bipid / Physique" character animation and skinning system, which we used to make the character animation in The Sims. The baby and its dancing animations were included with Character Studio as a canned demo, along with some other animations you could apply to any skeleton.
https://en.wikipedia.org/wiki/Dancing_baby