the narrator is an actual engineer, not a television personality
but he is cosplaying television personality for no reason
That often happens when people who don’t do much public speaking do public speaking.
you could never hear the audio that cleanly on a VHS even with HiFi tracks.
It is about attitude in voice, not about audio quality. It is very noticeable at 1.5x speed, 1x speed is too slow anyway with infinite pauses for such low density technical details.
It’s an engineer and they provide a transcription.