In a film which features the original low definition pre-war German TV system
https://www.youtube.com/watch?v=0oqJBVg7MxI
at 5:20 there is a short scene showing what seems to be a projected live TV image. No details given, but at that time the Germans did develop an intermediate film system for projecting live TV that used a conventional movie projector to produce the image.
Attached is leaflet describing Decca's large screen projection TV from 1954. I wonder what the life of its tube was?