A cutting dated 30 December 1974, which seems to be based on a press release, stated that ABBA would appear in a major New Year's Eve show in Denmark, performing So Long and Honey Honey.

The probability is that they were performances bought from some other television channel.  In fact it was Austria's Spotlight that was used - but only So Long was shown, probably because DR wanted to give equal time to each artist which meant one track each.

Sales support at DR Sales (Danish Broadcasting Corporation TV Archive) has confirmed it is not in their media archive and that in those days tapes were not saved or they were re-used for other programmes.

Thanks to Carl Magnus Palm, DR Sales, Jozsef and Steen Vogelius Pedersen.