A full-length, behind-the-scenes special about Katy Perry's 4-day Witness World Wide livestream will premiere on YouTube Red, their streaming subscription service, on October 4th.
The film is called “Will You Be My Witness?” and shows the creation of the livestream, as well as the aftermath of Katy being on-camera 24 hours a day.
Katy released a trailer yesterday and it shows highlights from the live stream, including appearances by celebrity guests including Anna Kendrick, Sia, RuPaul, Caitlyn Jenner and America Ferrera.