I don't think it's a case of the wrong camera for either of them, I think they're giggling in advance at doing the wornout profile/frontal routine once again. Anyway, it's very cute, and it almost makes me swallow that annoying song!
Ah no, it's definitely a Frida-induced event! Run it from 2:07 to 2:10, freezing it at 2:10. Slow it down to half speed for best results
Frida is supposed to be turning to look straight into the camera, with Agnetha turning away from it to look across her at right angles: the classic ABBA video stance. But Frida has lost her bearings. She keeps on turning past the active camera and focuses behind Agnetha instead. You can then see her catch Agnetha out of the corner of her eye and correct herself as surreptitiously as possible. Agnetha tries to stifle a smirk, while Frida wisely transforms her face into a smile of sweet Fernando-friendly serenity.
Generally, Frida always did have a bit more trouble locating her active camera than Agnetha; there are loads of examples of this. My theory is that because Frida was the more natural performer, Agnetha had to do her homework when it came to camera angles and production instructions. But it might be worth taking that debate into its own thread
But for your theory to hold water, there must have been an actual 'wrong camera' to look into. right? How come all the angles are frontal (full, at an angle, or bizarrely, from someone dangling from the ceiling)? She even looks back and to the left at around 3:13?
(Hey, this was fun, I should have studied law instead of wasting my youth listening to ABBA!)
Appearing on East German tv, each ABBA member is given a board with their name on it. The production team has pulled off the tricky 'Agnetha' spelling, and even the accent is correct for 'Bjorn'. However, 'Anni-Frid' is not so successful.
Earlier in this thread I posted Agnetha's 'one twirl too many' So Long gaffe. Maybe she was counting the twirls in similar fashion to the following video. Here, all Agnetha has to do is count to three, so that on the fourth beat they all say 'Happy New Year' together. But she helpfully counts the 'four' too, forgetting that she can't do this while starting to say the line at the same time