South Dakota Public TV Sign Off - April 25th, 1985 - REUPLOAD (and not fake) 

This is the nightly sign off sequence of South Dakota Public TV, recorded on April 25th, 1985.
There is another video here that claims to be an SDPTV sign off from the same time period, but it's a fake and poorly done mockup. THIS is the original recording, first uploaded to RU-vid by a user named MicroJow.
His channel is still existant, but all of it's contents have been hidden or deleted.