(like I can’t overstate how big of a spoiler this is)
I haven’t see much discussion of this so I’m going to pose it here —
With the exception of most of the fish bowl moments in the San Diego house, and the early fly on the wall interviews, YCSE is fictionalised.
By this I mean: again, I don’t think Holmes or Billy were promoted to do so or say anything in particular by the filmmakers and aside from the same editing process that all documentaries experience, have not been misleadingly depicted in their own life.
But the final half of the movie with Seyfried, in particular the scenes where they discuss planned re-enactments or capture Seyfried’s “real” reactions to footage or scripts? This in itself has been scripted by Fielder or Oppenheimer in order to essentially capture the documentary’s theme.
There is no arc here otherwise — they had a lot of good footage and Billy is perplexing but they were never getting anything of substance because Holmes is in it for some long con. A more interesting narrative emerged of “Fielder as Holmes’s mark”, which would mirror Holmes’s pattern of manipulating men by her affect of some aspect of gender performance (a motif in Seyfried’s show as well…).
That entire (amazing) last scene between Fielder and Seyfried is, for lack of a better term, fiction. Maybe Seyfried didn’t have a literal script in terms of “confronting” Fielder in that way but for sure the filmmakers planned that as their final set piece in which the depths of Fielder’s contamination as a documentarian are revealed. Seyfried names the thing the documentary has been hinting at for the last 60 minutes: beyond wanting to protect her interests from the strange, unlikeable Billy, Nathan now feels a desire to put Holmes’s interests before objectivity. He cares about her in some way he never intended.
Nothing is ever lingered on but the hotel/prison call scene is probably the other key “scripted” element. Nathan waiting by the phone all day like a teenager waiting to be invited to prom and then, when he gets Holmes on the phone, it isn’t like a documentarian getting his subject to speak. It’s like a teenager speaking to their crush.
Do I think this scripted element is based on a real feeling from Fielder? Maybe — in those heads between part 1 and 2, I have no doubt Fielder interrogated his own responses to Holmes and realised that she was likely trying to manipulate him. Maybe they watched back the footage and saw Holmes’s mirroring of Fielder and her intense “focus” on him (a typical effort by sociopaths to ingratiate themselves is to make someone feel very important and special).
So basically a feature documentary morphed into a mega episode of The Rehearsal, and with an interesting “angle” to portray, it was easier for A24 to convince Seyfried to engage in some strange meta-version of herself responding to the subject of a character she played years ago.