Alt-History material on civilizations

Does anyone have any recommendations for material discussing Atlantis, or similar "lost" civilizations?

I know of Atlantis by Donnely. And, The Story of Atlantis by W. Scott Elliot though I haven't personally read this one.

In the same vein, do you have any favorite video channels that discuss these topics? I know of MrMythos on YT and his series discussing Atlantis as well as Inner Earth.