To be honest I saw a pretty good photo comparison of the infamous proof footage with her and work colleagues posing on a stair case that convinced me it was probably her. They did themselves no favors with the set up; it was terrible as proof, it was dark, she was not close up, she was wearing a mask etc - but someone on Twitter adjusted brightness and contrast and pointed out things like she was wearing the same watch as Tiffany, and some other physical aspects I can't exactly remember we're the same too - maybe a mole on her arm or something.

So my guess is she's alive and that was really her, but somewhere along the line some glowie figured this fainting episode of hers would be a good opportunity to discredit doubters, and so somehow encouraged Dover and her employer to not try very hard to prove she was alive, and also encouraged her to stop using social media, go dark "for her sanity" as it were and only deal with media stuff through them. The result would seem to be this TV special, which will be a cleverly achieved hit piece on "anti-vaxxers" and conspiracy theorists.