Having scrolled through their page; that upload in itself is beyond random if they’re not playing. There’s not exactly a habit of uploading gig footage.
They done a secret set in 2017 on Woodsies. So it’s not happening, sometimes a gap is just a gap.
Sometimes a gap is worth speculating, but I think you can file them under the former rather than latter.
‘Here’s the fuse box. I’m just gonna leave this logged in, please don’t open that super confidential window containing business unrelated to the festival we run here every year. Cheers, want a brew?’