I saw that one, but didn't think much of it. Basically, certain academics are willing to write convincing but false studies in order to promote their worldview. For example, Stephen Breuning claimed that IQ could be raised by dozens of points by changing one's environment—naturally something Left-liberals wish was true—but practically all of the data he provided as evidence was fabricated. He got away with this from around 1978 to 1983. In 1983 he was found out, and yet strangely his 'work' is still being cited today.

More importantly than this video, Keith Woods' latest video on the harmful effects of 'diversity' was the most productive one I've seen recently, mostly because it brings to attention several academic papers that were heretofore largely unknown to us. He clearly did his research.