You will first see Mal and Paul boarding an NBC News Lear Jet they appear to be sharing. It is April, 1967.
It looks like Paul signed autographs during the flight.
They were traveling to the United States, first visiting Paul's girlfriend, Jane Asher, in Denver, Colorado. From there, they went to Los Angeles, meeting with Beatles' publicist Derek Taylor at his Hollywood Hills home (the one he was renting on Blue Jay Way). It is on the flight back to England that Paul conceived of the Magical Mystery Tour film.
I'd say that girl was doomed to be a smoker, like her dad, who died of cancer.
Taylor must have taken Mal and Paul on some sightseeing, because the film footage shows them driving around Los Angeles.
The last bit of Los Angeles footage is of Derek Taylor, McCartney, and Mal Evans at some kind of outdoor mall, decorated with the latest, trendy designs: