I'm wondering which of those were first/second serves? The initial point looks like it could be a first serve, but the others appear to be second serves from Federer based on their mid-box placement and slower speed.
They do showcase Djokovic's strength as a returner very well, regardless, although (IMO) they still don't reach the peak level of that one break of serve that Djokovic did against Isner this year (can't remember the tournament, but I definitely remember the sound as my jaw hit the floor).
Edit: I think it was the at the Miami Open sometime in the 2nd set.
0-0 (return winner): 1st serve
0-15 (error): 2nd serve
0-30 (error): 2nd serve (point not shown)
15-30 (return winner): 1st serve
15-40 (winner): 2nd serve