@Helleofabore I think your comment, prior to its delete, asked about the date of Peter's video interview? The original twitter post was 2022 and it said it was from the previous day, although I can't find any corroboration of this.
However, he does reference the same story in a piece on his website which was written some time during or after 2010 and also appears to reference it in his infamous 1997 letter.
A timeline of the times Peter has had his views linked to pedophilia. Since poor Peter keeps having his totally benign views quoted out of context, everything below is taken from the information he has published on his own website:
1981/82 - wrote a chapter on the age of consent which was published in a pro-pedophile book. His chapter makes no mention of sex between adults and children.
1997 - letter to The Guardian in which he defends an academic book about adults having sex with children. In his words the book offers "a rational, informed perspective on sexual relations between younger and older people” and documents “examples of societies where consenting inter-generational sex is considered normal, beneficial and enjoyable by old and young alike". The letter continues "the positive nature of some child-adult sexual relationships is not confined to Western cultures. Several of my friends, gay and straight, male and female, had sex with adults from the ages of 9 to 13. None feel they were abused". He offers justification for these views in a 2020 interview published on his website.
1997 - Interview with a 14-year-old boy called Lee. "Lee" is unusually articulate for a 14 year old, and keen to describe his sexual experiences to Peter in great detail. "Lee" says that "the paedophiles I knew always asked me if I wanted sex. They didn’t pressure me. If you consent to having sex with a paedophile, it’s fine. If you don’t, it’s not”
1998 - wrote a touching obituary for PIE founder Ian Dunn. Despite several high profile exposés and their subsequent impact of Ian's political career, Peter was sadly not aware of Ian's views on pedophilia. This did not prevent him from writing his glowing obituary which he, unfortunately, did no research for.
2010 or later - he writes on his website about a friend's positive experience of sex with an adult at 9 years old. "As an example, the film-maker Derek Jarman told me that he had sex with an adult, at his initiative, from the age of nine." He calls this experience . The reference terms he uses are "inter-generational sex" and "early sexual experiences".
Derek Jarman is dead and so not able to confirm or deny this.