A strand of her hair fell on her shoulder, because she was moving continuously (like crazy) it was moving too in a perfectly believable way, and IT EVENTUALLY FELL OFF THE SHOULDER/SHIRT LIKE REAL HAIR and got mixed into other fallen hair. How is that generated? It's too small detail. Are there any artifacts on her side?
Edit: she has to be real. Her lip movements are definitely forced/edited though. It has to be a video recording of her talking. And then a tool/AI has modified her lips to match the voice. If you look at her face and hand movements, her shut lips seem forced.
Nah, having used HeyGen a bit, it's extremely clearly a HeyGen generation. There's a small number of movements and expressions that it continually uses (in forward and reverse).
Edit: I mean, to be clear, it is a real person, just like the author's video is. The way HeyGen works is you record a short clip of you saying some stuff and then you can generate long videos like these of you saying whatever you want. So the stuff you noticed does come from a real video of her, but it's not a real video that's lightly edited by AI, more like the AI has a bunch of clips it can continually mesh together while fixing up the mouth to continually generate video.