https://www.vice.com/en_us/article/43k9m9/wwe-hid-a-pre-show-rehearsal-to-youtube-a-glitch-exposed-it

On Saturday, WWE posted an in-house production feed of the day’s TV tapings for its NXT UK series, including closed-door pre-show rehearsals, as an unlisted video on its official YouTube channel. While behind the scenes WWE footage of many varieties has surfaced over the years in a mix of official documentaries as well as all manners of leaked and intercepted videos, rehearsals have almost never been among them, and WWE keeps them close to the vest.

This production feed, then, is an unprecedented look at how the biggest company in the professional wrestling industry produces its television shows that was accidentally made available to the public via a YouTube or Roku glitch. More on that part of the story in a bit.