Graham Hancock, is probably the dude you're thinking of. Big proponent of the theory of the Younger Dryas period being the ancient cataclysmic event that we read about in mythologies and religions.
Some call him a kook, but I think he's a free thinker who might actually be onto something.
Videos have become more embellished and sensationalized. I don’t know if they have one seed of fact or if it is 100% BS.
This video is long and seems intended to shock you. It is interesting but reads like Sci-Fi. The Voyager tale
