Hello
I enjoyed the video, the atmosphere works very well, the association was not something I saw coming but it was very good and the scene selection especially helped about that. I enjoyed also the small additions of scenes from other animes, they blended almost seamlessly.
However visually, it was quite dirty, I think Lokkiclu was suggesting your transitions actually overwhelm the clips, there are a lot of fades and some weird blurry cam moves, it needs to be much cleaner, cuts are usually a better alternative to fades and you can always use some brightness or blurs to help smoothing them instead of using fades that overloads the screen.
The masks are also very poorly implemented, it honestly was rather comical to see the hero turns into a zombie like that, maybe adding some glitches and light shakes would have helped a bit, as well as adding a small color correction.
But overall, a very fitting mood, good job on this!