Continuity mistake: In the intro credits, John, George and Ringo jump onto several stacks of newspapers and John is sitting on them to the right. In the next shot he is crouching with both hands in front him ready to jump off. (00:01:25)
Continuity mistake: When The Beatles first enter their stateroom on the train we see the door as Paul opens it and there's a first-class sign on it. Later Norm and Shake leave the stateroom as the older grumpy gentleman walks in. They never leave but this stateroom is not the same one that The Beatles walked into before as it has another sticker under the first-class sign that reads, "All Seats Reserved". (00:02:55 - 00:06:00)
Continuity mistake: Shake has only one Pepsi which he gives to George, then later there are two. (00:03:35 - 00:05:05)
Continuity mistake: As The Beatles sit in the train car talking about Paul's grandfather Paul says, "he's nursing a broken heart" and Paul is sitting behind his grandfather. In the next shot he's leaning in front of him. (00:03:45)
Continuity mistake: John asks Paul's grandfather, "Are you nursing a broken heart?" and if you look over his head the window is closed. No one goes near it but two shots later John stands up and walks over to the old man and the window is now open. (00:04:10 - 00:06:35)
Continuity mistake: Paul combs his hair in the mirror during the train sequence. After that a lock of hair appears over his left eyebrow for several shots. By the end of the scene his hair is back to being combed perfectly. (00:04:30)
Continuity mistake: On the train we never see Shake hand anything to John then all of a sudden, he has a Pepsi and his hand. (00:04:40)
Continuity mistake: Paul's Grandfather has a wide grin on his face when Norm walks into their car on the train. In the very next shot it's gone. (00:05:00)
Continuity mistake: Sitting in the lunch car Norm gives Paul's grandfather the pictures and the old man says, "Hey Paulie would you sign one of them for us" as he puts the pictures on his plate. In the next shot the plate is not there. (00:09:05)
Continuity mistake: Wilfrid Brambell asks Paul to sign a Beatle picture and he uses a ballpoint pen. Later, he copies them over using the master copy that The Beatles signed with ballpoint pens. Their signatures are now different (done with a thick felt marker) so they can stand out better in the black and white shot. (00:09:10 - 00:45:50)
Continuity mistake: In the lunch car as Paul signs the picture for his grandfather he's holding it with his right hand. In the next shot his hand has moved and he's holding in with his thumb. (00:09:10)
Continuity mistake: As Paul runs out of the train to his awaiting limo its door is open. In the next shot we see him from a different angle and he opens the door again. (00:16:20)
Continuity mistake: As The Beatles leave the train Paul goes through the first limo and we can see the second limo he's running to with a bunch of photographers standing at the side of it taking pictures. In the next shot the photographers are standing in front of the car and not taking any pictures. (00:16:25)
Continuity mistake: When Ringo looks in the mirror in the hotel room he has a peeled banana in his hand, then in the next scene it disappears. (00:17:50)
Continuity mistake: As The Beatles leave their hotel room, in the corner on a left is a guitar case, a vase, and a bottle of Pepsi underneath the mirror. When they come back the bottle of Pepsi is gone. (00:19:00 - 00:24:35)
Continuity mistake: As The Beatles go out to the field while "Can't buy me love" is playing Ringo has his camera. It disappears after they come down the fire escape and doesn't return for the rest of the scene. (00:37:50 - 00:39:35)
Continuity mistake: When the Beatles run out into the field it's an overcast day. In the very next scene the sun is shining. (00:37:50)
Continuity mistake: In all the overhead helicopter shots the shadows are very long. The shots on the ground have less of a shadow indicating they were done several hours later. (00:37:50 - 00:38:45)
Continuity mistake: Watch the clock on a wall. Six minutes of the movie go by but that clock hasn't moved one minute. (00:39:50 - 00:46:25)
Suggested correction: The clock could be broken.
This is pure speculation, not a valid correction.
While it's possible the correction was done without viewing the scene/movie, a clock not moving (or showing the wrong time) isn't a valid mistake unless the same clock is shown working in the scene. The original mistake does not indicate the clock is working or that the time changes.
Continuity mistake: When John talks to the woman by the staircase if you look at the clock above his head it reads 3:25. In the very next shot of George going into the TV producers office the same clock now reads 6:20. (00:40:55)