Russians don't celebrate Christmas on the 25th.

That was also what I took away when watching the video. Russians don't celebrate Christmas on the 25th (they Celebrate on January 7th), but even more than that: Russians don't celebrate Christmas the same way we do in the west.

Their "Christmas" family celebrations are on New Years Eve.

So if you're drawing conclusions from them not working on the 25th (which is a literal normal day in eastern europe) then signs point elsewhere unfortunately.