I think there is one or two gameplay videos in co-op mode on Youtube, but yeah I can understand why there's not more of them considering this is local co-op
Still you can check out the demo trailer to see the co-op in action if you want 👍
Yeah, I seen this video and its a nice way to show what theco op playthrough is like though I wish many poeple will post co-op videos of Aqua Ippan without death and no miss, now there are msotly single player mode videos , if the game reaches to its final version, we hope we can see a perfect co-op game play in the future
by the way if you find a bilibili of a co-op video show us the link.