Heres another suggestion... if we can arrange the order of frames it might be possible to print on both sides of paper and have two videos back to back.. or part one on one side and part two on the other... in other words
5 sheets of 10 frames per page right?
when its done printing flip five sheets over and print on back side.
only caveat is say .. a 5o fifty frame animation count 1-50 (normal) non stacked on front side
but the reverse side needs to count down frames 50 -1
so frame 1 is on top of card and frame 50 is on bottom side of card
theoretically it should work.. what do you think?