Woah, check out this page: https://www.google.com/sky/about.html

2011 in the footer. Remnants of the old google of a by-gone era. Simultaneously feels both like yesterday and an eternity ago.

The video is from 2008: https://www.youtube.com/watch?v=gX9MeF2Au9c

I bet whoever made this is no longer there and it has been forgotten about internally.