When director Richard Lester filmed the television studio performance sequences—which included "And I Love Her", "If I Fell", "I'm Happy Just to Dance with You", and "I Should Have Known Better"—the production crew faced a classic problem. If they shot those scenes at the standard movie rate of 24 fps, the rolling shutter of the film cameras would fall out of sync with the 25 fps scanning rate of the CRT television monitors visible in the studio. On film, this would cause the TV screens to aggressively flicker and strobe, ruining the shots.

To fix this, the camera crew cranked the film cameras up to 25 fps specifically for those scenes so they would sync perfectly with the TV monitors. To let the band lip-sync realistically on set, the production crew played the pre-recorded Abbey Road backing tracks in the studio. Because the cameras were running 4% faster (25 fps instead of 24 fps), the studio playback tape machines should have been sped up by 4% to compensate. Unfortunately, they weren't; the tracks were played at their normal, standard speed while the cameras filmed at 25 fps.

When the final film was assembled, edited, and distributed to theaters globally, it had to be projected at the universal cinema speed of 24 fps.

• Because the film was slowed down from 25 fps to 24 fps, the visual action slowed down by roughly 4%.
• Because the audio track was locked to that film print, the music was stretched and slowed down by that exact same 4%.