From what I can gather, this was either a music video that was broadcast live for Danish TV, or was shot at another time, and then aired later on.
It is a sad video to look at once you have seen the well-known one. I don’t even like the addition of the phones despite the title. However, we do get a hallmark of future ABBA music videos here: one of the members singing towards the camera while the other is in profile.
That’s it! I would have excluded it, but it does look official enough that I felt it needed to be included in this retrospective.