If you understand the language there are some very interesting interviews - among others with a childhood friend, her brother, her private secretary and the author Bo Bramsen. People who are no longer among us.
If you just want to enjoy the historic footage I find especially the 4th episode interesting with colour footage from events of the first years of Frederik IX’s reign: the funeral of Christian X, a state visit to King Haakon in Norway and a new year’s gala. Short but lovely clips.
I think there is 6 episodes - up until now 4 of them are available on DR.dk.