I transcribed (roughly) the part about Mumsnet from the OJ interview.
Mumsnet [is] an incredibly effective platform for the radicalisation of women who for very good reason feel justified grievance about the sidelining of young mothers, the eradication or at least the erosion of material state support for families and mothers and who end up turning that legitimate grievance against the so-called trans lobby. So I do think you’re right that there’s a kind of process of radicalisation where you have lots of women who have justified grievances and who are then taught to target those grievances at what is in fact a tiny minority of the population who are disenfranchised in all sorts of ways.
So according to her, young mothers are being radicalised into blaming the lack of state support for families on the trans lobby.
She also complains about: people who at once claim that what they want are more open and difficult and honest conversations about complexities of identities and gender and sex but whenever they’re confronted with those conversations, like, shut them down in the most ideological and policing way possible, which just gives a lie, I think to the idea that what they’re concerned about is free debate and tells the truth that what they’re concerned about is the public recognition of the rights of transwomen and to a lesser extent transmen which they’re less obsessed about.
It seems that asking them hard questions which they don't like and can't answer is 'shutting down the conversation'.
And then she says that the reason that the GC feminist movement is bigger over here than in the US is because feminists over there have more of a history of siding with the conservatives. She gives the example of siding with Reagan in the fight against pornography. They remember that that all went wrong because the Republicans were also anti-gay and the feminists weren't (I'm not sure what this had to do with porn - she doesn't explain). So we're just ignorant and naive, and the American feminists know that it's a bad idea to side with the right.
I only watched the last 10 mins as recommended by Franca123 (thank you for that tip), but she seemed very hesitant in this part, as though she didn't have a clue what she was talking about. If she was really GC and just trying to show up bad arguments, I think she'd have made a better job of stating the poor TRA arguments, rather than just looking like someone who doesn't know what they're talking about.