Actually I feel like my comment on your amv was really short
(there will be spoilers about ffx-2 in the following)
About the glitch at 0:52 : yeah it was kind of an effect I wanted to make, but I agree with you....it's not really good !
But if you want a short explanation : my amv is about FFX-2, in which one "Tidus", the main character, is supposed to be dead. Just before 0:52 you can see a man approaching, really looking like Tidus, but it's not clear. The short greyscaled video at 0:52 is actually Tidus. So the idea was to put a short video saying "is it him ??? because he looks really similar !", but the sequence in grey is too short...About the couple getting shot twice : you're wrong !
People who haven't played the game often make the mistake, but there are 2 couples ! two boys and two girls ! (they really look like actually !) There is only one moment where the girl of one couple is seen with the boy of the other couple : in the scene around 3:14. So the first couple to be shot is not the same as the one at the end Anyway I'm glad you liked it !
Cheers !