The canon games are made by Capcom, which is unrelated to Ace Attorney Online or Attorney Online. This website, Ace Attorney Online, is where you can make your own Ace Attorney-style fangames. The YouTube video you showed is about Attorney Online, a "multiplayer Ace Attorney," which is simply a chatroom to pretend to do an Ace Attorney case.
It's confusing, yes, but the short version is that you're looking for Attorney Online.
[D]isordered speech is not so much injury to the lips that give it forth, as to the disproportion and incoherence of things in themselves, so negligently expressed. ~ Ben Jonson
Current AAO Development Priority: Issue #94: Grayscale Mode