Why is it that these kinds of videos come out when I least expect them to? Whatever, on with the review.
Story/Writing: This was indeed a really good ending to the series. Heck, I wouldn't be able to make a better ending if I tried! I will admit, however, that seeing Old Zero telling the story did feel pretty forced, and a bit cliche. 4/5.
Art/animation: Nothing short of excellence. 5/5.
Voice acting: Again, really good, and in fact probably the best thing about the series, but it does have some problems. The main problem I have is the voice actor for Old Zero. He sounds like some little kid pretending to be an old man, not to mention also sounds completely out of place compared to top grade voice actors in this such as Hnilmik or Omahdon. Also for Omega and Zero's voices in this, their tone always seemed to just shift outta nowhere with no real relevance to the story. 3/5.
OVERALL: Great entry in the series, but not the greatest. I can definitely understand the time and effort that is put into these animations, but this just didn't hit it with me. I dunno what it is, but something just makes it feel like the black sheep of the series.