*potential spoilers for Re:Zero series so far!*
This is an 'MAD' which stands for Mujiku anime douga, or, animd music video! So MAD is basically the Japanese version of AMV XD Or is AMV the English version of MAD....? lol!
Anyways, this is so good. It really highlights everything about the series that is great, and it's a nice way to sit in the pain we've been put through so far, you think?