Creating film in virtual art gallery

Hello,

I am making a series of works for my virtual art gallery. All of the work in this series has thus far been a series of still jpegs. I would now like to introduce motion. 

I would like this artwork to include an existing film that I've made playing traffic driving along a section of motorway on a large led screen sited on the left had wall in the room below.

Any ideas would be greatly appreciated. 

Marc