While I was looking for ESB trailers to post on the The OT Trailers/Promos Thread I came across this trailer;

The Empire Strikes Back - Scope Vivaldi Teaser (35mm)
https://www.youtube.com/watch?v=CroqdjDv82s

Its obviously meant to evoke the original ANH teaser from 1976, but that seems more like something someone would do as a fan project. Would the general public even have known about the ANH teaser back in 1980?

Could someone verify if this is a real trailer shown in actual theaters?