I just recently discovered that theory through that very same video, so when I saw this new "Aquaman" tailer, I had the same reaction. When they discovered Atlantis (or at least some Atlantis-related city) out in the desert, I started wondering, "are they referencing what I think they are?"And when they mentioned that it was in the Sahara and that there used to be water there, I knew for certain that they were indeed referencing the theory that the Richat structure is Atlantis.
Here's the follow-up video, by the way:
I've also done a bit more research on the theory that Atlantis is in the Sahara, and it turns out that it's a theory that's been around for about a hundred years. A German scientist named Leo Frobenius first claimed to have discovered Atlantis in northwestern Africa (approximately where the Richat structure is). Here's an old New York Times article about his discoveries:
https://timesmachine.nytimes.com/timesmachine/1911/01/30/104819013.pdf
Years ago, I watched "L'Atlantide" (1932) (starring Brigitte Helm, of "Metropolis" fame, as the Queen of Atlantis), and it portrayed Atlantis as being located in Africa. At the time, I thought nothing of it except that it was an odd idea to portray Atlantis as being in the middle of a desert rather than underwater, but I now realize that it must have been based on Frobenius' theories.