Well, that was crap!
The presenter did not even make the connection between strict, socially constructed gender roles and the increase in questioning of 'gender' questioning. Completely took for granted that only trans people question socially constructed gender roles. So the solution is obviously not to challenge the validity of social constructs but for individuals to seek to change sex.
Trans 'gender' only has meaning in a context of strict socially constructed gender roles, a pink box and a blue box. Changing which box an individual feels they fit within rather than getting rid of boxes.
Trans women do not challenge notions of femininity but rely on them to argue that they are 'better' women. Yeah, femininity is a male construct so of course men do 'feminine' better than women.