As quoted from the top comment, I agree with it.
When I say an AMV has "good editing," someone did a good job just posing anime clips with the lyrics and music of a song. But this... this is another thing entirely. This is someone using an incredible number of carefully selected clips from a dozen vastly different anime, then combining them together into a coherent story arc with such astounding fluidity that most viewers are unaware that the clips aren't all from the same anime. This isn't "good editing." This has ascended well beyond that.
Not mine.