That was real shame that the networks tossed out or taped over a lot of broadcasts (as reusability was one of videotape’s virtues) during those years up to about 1977. I would like to see videotape footage of Montreal Expo games at old Jarry Park (the Expos’ home until 1977 when they moved to the Big O).
Last summer, I shared here a YouTube video of a Dodgers-Reds game from June 1970 and it was one of the last times (if not the very last) the Dodgers played at Crosley Field and you get to see a few nice views of the old ballpark and it was recovered from the collection of an early home videotape recorder owner.
There is one CBC telecast that survived from 1970 Pittsburgh at Montreal at Parc Jarry late in the season. YouTube had it.
a few of the older parks had an incline rise in the outfield - used as a warning” track - crosley was one.