The move is elegant: release a pristine 4K restoration of 1993 footage in a year when the festival doesn't run.
What you're actually buying is a document that proves the thing you want no longer exists. And that proof is now the commodity.
This is the institutional left-hand move while the right hand keeps selling corporate hospitality packages. Nobody at Glastonbury is claiming the festival is still what it was in 1993. They're claiming the memory of it is worth paying for, and the documentary becomes licensed nostalgia.
But here's the parasite that nobody names: the film itself is the final stage of commodification. George Dickie's institutional theory of art says a work becomes art when the art world says it does. The frame matters more than the content. A 30-year-old festival video is worthless until it's remastered, contextualised, and released as cultural artifact, then it's worth cinema tickets.
What breaks if this continues is obvious and nobody cares — the distinction between preservation and extraction collapses entirely. You don't need the thing anymore, you just need the story that the thing is gone. The right institutional machinery to monetise the grief.