I have watched many of his videos over the years (tothe field) and found them "enjoyable". The quality is not great even though they were filmed on 16mm colour film, very expensive in the 60's and 70's.
That particular convention, or assembly as we called them, at Murrayfield brings back memories. I was there with my wife, we stayed at the Pollock Halls, halls of residence for University of Edinburgh students. Easy drive along Princes Street to the stadium each morning.
I am older than you and your mother so share the feelings of wasted years, although in my case it could have been worse. So many of my peers of the day have long since gone. I often say to my wife that it's not so bad for "worldly" people. From the day they are born they know they are going to get old and die. We, as JW's were brainwashed into thinking we would never get old, or even go to school in this old system.
George