Hello
I am not sure I really got your concept, I think it was clear in your head and you took some obvious risks in your comps to make sure it carried through but honestly I was a bit confused. Technically, I think the video flows quite well so it stays enjoyable but your comps could have been a lot cleaner, masks are quite easy to spot and they lack a bit of work to really feel like they belong to the added backgrounds.
Good luck!