I greatly enjoy hinged unhinged videos of someone trying to explain the connections in a franchise with a ridiculous number of entries. Thanks to this video, I now have the exact list and order of 57 pieces of media to procrastinate on.
Despite how chaotic this entire video was, it ironically did help me with the watch order. I left off after the first Heaven's Feel movie, and been wanting to watch the FGO ones after seeing some scenes in various AMVs. Because of how convoluted the franchise was, I just never bothered anymore. Good to know I can actually watch FGO by itself without having to recap all the other stuff before that.
A bit late replying, but am glad to be of help. The chaos was sort of intended on entertaining the long-time Fate watchers with a few inside jokes because a simple recap would've been too boring. :)