This is the bandeau that was worn by Princess Ragnhild's daughter in-law, Martha Lorentzen. In the video it looks like it has diamonds between the gold and it could also look like small rubies. But you can only see this in video.
The discussion was regarding different gold tiaras/bandeaus in the NRF. This is my understanding:
The whereabouts of Queen Maudís gold circlet bandeau is unknown. This photo is retouched, but if you zoom in on the right side you can see the gold frame: https://www.nb.no/items/324135f665300a95d7a016c251dc41de?page=0&searchText=
Princess Ragnhildís daughter Ingeborg and her daughter-in-law Martha have both worn gold bandeaus to Royal events, but the provenance of this/these bandeaus are unknown.
Ingeborg also wore a coloured bandeau in 1987, but the photos are too blurry to decipher what it could be:
Princess Astridís daughters have also worn bandeaus to Royal events:
1) CP Marthaís diamond bandeau worn by Cathrine Ferner in 1987 and Elisabeth Ferner in 2017 (a bracelet from Queen Sophia of Sweden).
2) A diamond and pearl bandeau worn by Benedikte Ferner in 1987 and 2017, also worn as a necklace by Princess Astrid (the provenance might go further back):
Another missing gold tiara in the NRF: CP Martha inherited a diamond and Swedish pearl parure set in gold from the Dowager Duchess of Dalarne in 1914, but the whereabouts of this parure is unknown. It might be this parure worn by Princess Teresia of Sweden (nee Sachsen-Altenburg):