Elspeth does a fair amount of the negotiating for this - she does run PR. Harley, presently thirteen, is allowed to sit in on a few of the storyboarding discussions - the documentary will not be fictionalized, but they still have concern for narrative flow. It's going to be very long, after all.
Significant portions of the documentary will be conjured recordings of events, from outside or even first-person perspectives, but an entire segment is devoted to personally profiling members and peripheral associates of the Golden Coven, one by one. Harley's not on the list - it's mostly a history documentary, with younger generations present almost entirely for 'where are they now' color, and he's not, technically, her son - but Elspeth and most of her family is. And Harley is permitted to lurk around the studio setup while various people prep with their interviewers, or eavesdrop, or - if they are sufficiently non-vampiric to allow makeup to stick - get that applied. It's a big production; the supernatural community would have found it just as convenient to spread it out, but the film people want everything taken down, edited for a consistent look-and-feel, and released according to schedule within a certain time frame.
So there are a lot of people around. Mostly vampires, but plenty of hybrids - there are most of Emmett and Rosalie's kids, over there, with the proud parents themselves - and wolves; Jacob is over with Elspeth - and even a few humans, ranging from imprints to Lizzie who's with Carlisle, Esme, and Lily, and also Alice and Jasper and their son Brandon. People not normally seen around the Golden Capitols have been hauled in. There's Marcus, no longer as craquelure thanks to magic, and Didyme at his elbow, literally radiating happiness. (Bella rendered her power opt-in along with several other mind-affecting abilities that can't be turned off, but it's very inviting, so people usually do so opt.)
And of course Bella and Edward themselves are present, flitting around, mingling. Their interviews aren't until later.
Kerron waves to Harley when he shows up.
"Why are you even here, are you getting in everyone's way? I'm getting in everyone's way," Harley says brightly.
"Besides, she does fancy molecular gastronomy. Deconstructed haggis or whatever's new this week. If she ever made a 'pie', the crust would be over here, probably raw and cut into some kind of shape with a cookie cutter, and the fruit would be over here arranged in a flower, and there'd be a little pile of cinnamon-sugar over here and then she'd drizzle it all with a caramel spiral and lecture everyone on how to eat it."
"If you'd drop the formality I could tell you if you're looking for me or my dad," Kerron says.
"...I don't know how to pronounce the first name."
"Then yep, I'm Mr. Corlett. It's Keh-run."
"All right. This way, please?"
"Sure. Later, Harley!"
"You didn't change back when you had the chance, though, Mom," says Nicole.
"I could have what I wanted about being human without changing everything. And Harley can have anything he would like to have about being a vampire without changing everything."
Nicole snorts quietly.
"All right, Cullen family interview," calls a poorly informed crew member.
"Which one?" call Henry and, from across the room, Brandon, at the same time.
"Er. Emmett, Rosalie, and their participating children?"
"See you around, Harley," says Emmett, and he claps Harley gently on the shoulder.
"Well - okay, cooking, for example," he says. "If I remembered exactly how I made something last time, and it turned out really good, then I might just decide to do the same exact thing again. But that would be boring as hell if I kept doing that! If I don't remember it exactly then I'm going to do something different, and maybe it'll turn out worse and I'll figure out how I did it before and go back to that, but maybe it'll be even better and then I'll do it more like the new way next time. Or maybe it won't be better or worse, just different. I like different."
"I suppose you'd always be consciously varying a theme or starting from scratch," says Esme. "You wouldn't be surprised the same way."
"Basically. Or I think I heard someone say 'transhumanizing', I liked that. Like, you can't even do that anyway without it being weird, because me and Alice and Jasper and Bella and Edward and Rosalie and Emmett all have Mom and Dad as parent-figures, but then if you cash that out, whoops, incest, and for everyone except me it was mostly a convenient front, except, built on actual scaffolding of respect and stuff. Jasper's older than Mom, but - whatever, you can watch my interview later if you care."
"People have got taste-memory; if you eat something it's still vivid for a little while after. If you separate something into all its parts, and then have them in sequence instead of all muddled together, they're all sharper, and you can do the blending in your head, and even if you don't want to eat that way all the time it'll make it easier to pick out the flavors next time you eat the regular thing. I don't just take apart ordinary food, though, I've been trying some experiments, I came up with a soup I really like."
"Well, obviously it's not soup anymore once you've done it," says Lily, "but it can have its basis in soup - if I deconstruct clam chowder, you wind up with potatoes and clams and celery and so on on a plate, arranged nicely, spiced correctly, and I turn the broth into a reduced cream sauce, but it's still clam chowder even though it isn't clam chowder, you know what I mean?"
"I like deconstructing foods that are normally conceived as inherently layered. Arranging them horizontally instead of vertically," says Lily happily.
"I mean, it was some cake, and some custard, and some fruit," Brandon says.
"Yes, that's what trifle is."
"But then there was also this side dish of excessive philosophizing that I thought had a weird aftertaste -"
"You don't have to eat my food if you don't like it!"
"If Jane's ever back. If she doesn't come back you're stuck with the Imperial Mint," says Lily. "He's not here today - actually I don't think they're interviewing him at all, I think the reveal here is limited to the array of species and witches. Elspeth told everyone that if we mention magic we should keep it kind of vague."
And then it's Brandon and Alice and Jasper's turn to be interviewed, and off they go, and Lily says, "Well, Mom, Dad, I'll see you Thursday, I'm going to hop home, I'm meeting Solana in a few," and she hugs Carlisle and Esme, and ruffles Harley's hair - she remembers when he was a baby - and teleports away.
"I was not much of an active participant by the time takeover was attempted," Marcus says dryly. "It was easier to do as Aro and Caius asked than to attempt to gainsay them, and I was much drawn to ease after my mate was killed." He lets go of her hand and puts his arm around her shoulders; she pats the back of his hand. "Aro feared the coordination humans were capable of in the face of vampire fractiousness - it was why he was so pleased to find Chelsea, and to have me to abet her - and Caius desired power."