Keanu Reeves is an actor who has starred in a number of popular movies including Speed, The Matrix, and John Wick. He is revered in the online community for being a wholesome person who tends to do the better thing, or at least avoids being terrible.
So if he is actually supports the charlatan who made this series then that would be disappointing.
Ok, but who’s the scientist bloke and what’s he claiming?
Earth is flat? Aliens walk among us? Billionaires are lizards?
https://en.m.wikipedia.org/wiki/Ancient_Apocalypse
In the series, Hancock argues that an advanced ice age civilization was destroyed in a cataclysm, but that its survivors introduced agriculture, monumental architecture and astronomy to hunter-gatherers around the world. He attempts to show how several ancient monuments are evidence of this, and claims that archaeologists are ignoring or covering up this alleged evidence.