I just got around to watching this.. part of it anyway, I usually ignore video post till later. Anyway I skimmed through it, but wanted to mention that record qualities varied through the years since this 1950s film had been made.
The LP's manufactured in the early 70s were subpar material, I know this from my association with sailboats.. any sailboat made between about 1971 and 1974 were subpar materials which show up with "blisters" today, it had to do with the 1970s oil crisis which led to cheaper, filler-laden fiberglass during the era, and that oil crisis had also applied to the materials used in making LP records, resulting in records more prone to warp and I don't remember what else. From 1974 on it wasn't a problem again untill sometime in the 1980s.
Just a bit of trivia I had learned about early 1970 LP records you might not of known.