RK
Okay, for some reason I thought for general backgrounds the BBC used a bespoke piece of hardware for playing out video (whether it's the London skyline or the BBC globe animation on the catwalk.)
The screens are fed from an AUX on the vision mixer, a different feed for each screen. So in theory anything that lands on the vision mixer can be cut or mixed into any screen. The Mosart automation controls this in practice, and it's generally a server clip, a graphic from Viz or an OS. It can also be a split of two or three OSs and it can be mixed from one thing to another in sequence.
Okay, for some reason I thought for general backgrounds the BBC used a bespoke piece of hardware for playing out video (whether it's the London skyline or the BBC globe animation on the catwalk.)