I don't even know if "WAI" means "Works as intended" cause if so, then he is saying "It's WAI" which would correspond to "It's Works as intended" which would be

I don't even know if "WAI" means "Works as intended" cause if so, then he is saying "It's WAI" which would correspond to "It's Works as intended" which would be super confusing grammer. Either way, you shouldn't use acronyms unless they're easy to understand and you know grammar.