You hit the wrong target.

Even if the staging is obvious, isn't it funny? All skits are staged, and so are sketches. I really don't get what the problem with staging is.

I think the problem only happens with comedy that pretends to be hidden camera but is actually staged. It gives off a feeling of being deceived. With skits like SNL or Whitest Kids You Know, it's different because you know they aren't trying to trick you.

Yeah, it's like a magician using an assistant. That alone is fine, but how the magic looks changes a lot once you reveal the assistant is in on it.

The feeling of being deceived is there because it actually is deception. If a skit is funny, there's no need to pretend it really happened. That's like a crutch. This video is exactly that. If it had been a clip from a sketch show, you'd wonder how it even made it on air. It's not that fun, and if it were in a writers' room, they'd say there wasn't enough there to shoot. But by showing it like a real situation, the audience feels like they're witnessing something genuinely spontaneous, and spontaneity is one of a comedian's key weapons. People laugh harder when they feel something truly surprising is happening. If you present a skit as if it's real, viewers watch it in a completely different frame of mind than if they knew it was a skit, so even something only mildly funny can be very effective at getting a laugh.