They have always been coming after the kids. The video refers to a PhD paper that is 160 pages of nonsense from 2018 by Heidi Gansen: https://deepblue.lib.umich.edu/bitstream/handle/2027.42/146061/hgansen_1.pdf
She was horrified to see children acting like normal children with normal gender roles, and decided that instead of letting kids be kids what we need to do is indoctrinate them into acting in an unnatural manner.