You MUST get the media specifications from the folks that built or own the display. There are no standards so we cannot answer your question at all. Playback specifications for these kinds of devices are usually very specific and narrow. I have seen everything from image sequences to Quick Time. The only thing that has been constant is that the After Effects Composition settings match the dimensions of the delivery file and the Render Cue or AME encoder settings must exactly match the specifications supplied by the manufacturer of the system.
70x20? VIDEO? Seriously? Jeez, that's not much better than the resolution on a good dot-matrix printer!
You'll be lucky to two get two-three text characters legible on the screen, and you MIGHT even be able to identify the typeface.... but that's pushing it.
hey sorry for not being clear, size of the screen is 80640 X 23040 (in pixels)
size of the screen is 80640 X 23040 (in pixels)
You are going to need a monster to playback something like that. Are you sure? The max comp size in AE is 30,000 pixels. Your specs claim a requirement for 80,640 which is about 20 4K displays.
The data rate for a comp that is 42 times wider than HD would be crazy and probably require an array of high end server grade machines and fiber optics to push even 20 fps video through the system.
As I said before, you MUST contact the manufacturer for their exact media specifications.