I was alerted to these vids recently - amazing stuff! There are 5 parts, so I'll post them consecutively with some notes.
This video contains:
Coverage of the NYC con in 1978 (by Barbara Feldon!) - check out Bill's shiny jacket - so hot!!
Annoucement of ST:TMP from a NYC TV station
Movie promo trailer, which seems to be narrated by the Exposition Police - I think this was not shown in theatres, but was sent to owners of movie theatres to get them to book the movie