Watch this...no sarcasm. It’s an analysis by an expert musicologist and composer. It’s a very good, professional documentary and analysis.
Also, not sure if it’s on You Tube, but I saw last year Deconstructing The Beatles by a Beatlesologist...that film focused on their breakout year. Their breakout year was breathtaking in what they did and accomplished.
There will never be another band as great as The Beatles, IMO.
George Martin was the perfect producer too