Welcome Gespro.
Yeah, I recall seeing "Heritage", it seems to me it was played on a local TV station (sort of a "public service" type thing), and I think it was played at the Kingdom Hall much later as well.
What I remember most about it was that the production values were way down the scale, i.e. it was a bit overdone and corny. But then, it was a long time ago, and some broadcast TV stuff was sometimes like that as well.
One scene sticks in my mind: Teenagers out cruising in a convertible, with at least one of them showing an outstretched arm, holding a beer (well, that's my memory of it anyway)
---Dan