Real-time video composites were achieved on analog hardware such as Scanimate [0] starting around the 1970's; traditional film matte techniques [1] had also bee

Real-time video composites were achieved on analog hardware such as Scanimate [0] starting around the 1970's; traditional film matte techniques [1] had also been used for well over a generation by that point and a travelling matte would suffice for compositing that image. [0] https://www.youtube.com/watch?v=UHjkMThH0aE https://www.youtube.com/watch?v=UHjkMThH0aE [1] https://en.wikipedia.org/wiki/Matte_(filmmaking) https://en.wikipedia.org/wiki/Matte_(filmmaking)