Well this paper isn't about intelligence or psychology, it's about physiology. Reaction times and rhythmic anticipation tests are all quite well-grounded and established tests.

Secondly, I've had a brief scan of that 3.5hr long video and dipped in and out of a few places are familiar to me. Straight away I notice she's reading out the conclusions from the Anderson paper on Hunter-Gatherers that came out last year (to huge media attention) but which was not well received by anthropologists who went through the stats and found the whole thing to be a biased mess (see: https://www.sciencedirect.com/science/article/abs/pii/S1090513824000497?dgcid=author). It would be unfair to blame the original authors since they were all (and I believe still are) undergraduates and so the PI should've been more rigorous. Then I briefly dipped into her 'debunking' of the selfish gene where she opens with the astonishing take that bipedism isn't a heritable trait...this is not the voice of an expert and there are better critiques of the shortcomings in evopsych out there.