Watching the video my first thought about the ocean levels going up and down such extreme amounts had to be global warming. But why I thought? Could not be dinosaurs and their mega size suvs, they were long extinct by then. Cant be man caused we were not evolved yet and our line was still up in the trees. So has to be Sun activity, natural events like volcanoes or Earth rotation changes.
Life has endured for tens of millions of years. Life forms come, dominate and then fade. The Earth changes but always wins in the end. So global climate change is as natural as the sunrise and just about as pointless to try to fix. You cant fix time.