Hey, it's mugetsu-15 from the subreddit. This video features me(as Riruka), KuroYoite(as WD Ulquiorra) and 2 other players, clearing the 3rd Seat & Up co-op, dying and reviving...then finally cleared it.
Crappy replacement cable - connection from my phone to Mac was cut off at the end before the stage rewards screen... :P
Here's a guide I made for future references(for global players):
/ super_coop_recommendations_and_musts