To me it's about as close to her voice as saying "It's a woman's voice". Not to say all women sound alike but the sound I heard from that video above could maybe best be described and "generic peppy female American spokesperson voice"
Even listening to it now with the suggestion that it might sound like her I don't personally hear Scarlett Johansson's voice from the demo.
There may be some damming proof where they find they sampled her specifically but saying they negotiated and didn't come to an agreement is not proof that it's supposed to be her voice. Again, to me it just sounds like a generic voice. I've used the the version before GPT-4o and I never got the vibe it was Scarlett Johansson.
I did get the "Her" vibe but only because I was talking to a computer with a female voice and it was easy to imagine that something like "Her" was in the near future. I also imagined or wished that it was Majel Barrett from ST:TNG, if only because the computer on ST:TNG gave short and useful answers where as ChatGPT always gives long-winded repetitive annoying answers
How else am I supposed to interpret this?