compilation 1, and two appear in the three-disc versions of the compilation, titled 1+. The mimed performance from The Music of Lennon & McCartney was also included on 1+. Impact and legacy The success of "Day Tripper" / "We Can Work It Out" popularised the double A-side format and, in giving equal treatment to two songs, allowed recording artists to show their versatility. The Beatles' decision to send out independently produced films to promote their music anticipated the modern music video and the rise of MTV in the 1980s. According to music journalist Robert Fontenot, "Since these performances [of 'Day Tripper' and 'We Can Work It Out'] were not filmed in front of an audience, they can be considered the world's first music videos as we understand the format today." According to author and musician John Kruth, the guitar riff on "Day Tripper" was a part that every young guitarist in the UK and the US "had to learn". Lenny Kaye, an aspiring musician in 1965, later described it as one of the era's "great riffs" and highlighted the song as an example of how the Beatles' music was always harder to master than that of contemporaries such as the Rolling Stones and the Yardbirds. The song's use of an octave-doubled guitar riff anticipated a characteristic of Cream and Led Zeppelin later in the 1960s, particularly in their respective songs "Sunshine of Your Love" and "Good Times Bad Times" and "Heartbreaker". Lennon said that McCartney's riff-driven "Paperback Writer", the A-side of the Beatles' May 1966 single, was "son of 'Day Tripper'". Although Lennon expressed dissatisfaction with the song, it has remained popular with critics and fans. Dave Marsh described "Day Tripper" as the most authentic approximation of a genuine soul recording the Beatles had yet made. Tim Riley deems it "Lennon's guitar heaven", with a mid-song "rave-up to end all rave-ups" and a "brilliant yet coolly irreverent" riff. He also admires Starr's drumming, particularly over the coda, saying that it serves as one of "Ringo's finest moments" on record. Less impressed, Ian MacDonald says the track suggests that wit in the form of musical jokes had become the band's "new gimmick". He considers it to be "Musically uninspired by The Beatles' standards" and ruined by the engineering error in the third verse. Alex Petridis of The Guardian finds the song inferior to "We Can Work It Out", writing: "Its addictive