This 16 May 2019 video says about itself:
The Ghostly Origins of the Big Cats
All of today’s big cat species evolved less than 11 million years ago and yet their evolutionary history remains an almost total mystery.
But scientists have recently discovered a major clue about the origins of the big cats, one that could provide a whole new starting place for solving this puzzle. Thanks to Ceri Thomas for the excellent Panthera blytheae and Panthera atrox!