It all depends on how you look at it, but in those days, 42 minutes would not be considered a full concert. Not for me, anyway.
http://www.beatlesbible.com/1966/08/29/ ... l-concert/"Although they made an unannounced live appearance in January 1969 on the rooftop of the Apple building, The Beatles' final live concert took place on 29 August 1966 at Candlestick Park in San Francisco, California."
Wikipedia:
The Beatles' rooftop concert was the final public performance of the English rock group The Beatles.
I think "public performance" and "unannounced live appearance" says it right.
Coming from me:
The Beatles Candlestick Park concert was the last one with the original 4 line up. After that, the Beatles did not perform in any further 'concerts', per definition of the word.
The Rooftop Concert in reality wasn't a concert at all, just an impromptu jam session of sorts, which is a better description, technical tho it may be. And since there was no official paying audience, perhaps the term 'concert' should not be applied. However, the phrase "Rooftop Concert" is apt here because "Rooftop Gig" or Rooftop Jam Session" just doesn't sound right.
As far as the Beatles are concerned, in my opinion, the definition of a Beatles concert should be "A large-venue performance with hundreds of screaming fans." Anything less than that maybe should be called something else.