These are two well composed documentaries regarding the time scale of which electronic music appeared and who the musical artists were who used synthesizers and composed with them. "The Evolution of Electronic Music (1929-2019)" sketches out very early applications considered electronic music and plays a small sampling of the works being represented. Although popular recordings which dabbled with synthesized tones in this documentary are skipped over in this work (No Beatles, Monkees, Byrds, Beach Boys mentions!).
Our second documentary clearly focuses on this pop music synth implementation:
The surprise is that The Beatles were far from the first popular band to use a synthesizer in their arrangements. Our host travels back quite a bit further in the past to find his answer. Amazing!