She doesn't even understand how "deep fakes" work. I was laughing like crazy when she said it. Obama, Biden, and Kimmel would all be surrogates. The audience would be in on it. Then video would be constructed replacing the surrogate with the real Obama, Biden, and Kimmel.
But the person recording was in the audience, meaning he paid a huge amount to be there (for Biden's campaign) and was probably recording what he was enjoying and shared the real video which then went whoopsie viral showing Biden's freeze again.