Princess A Welsh Bard (1946)
https://youtu.be/2WUtGN2rdyw
Mountain Ash, Wales. Princess Elizabeth becomes a bard in ancient Welsh ceremony.
Druids raise the ancient and sacred sword above their heads for the ceremony at the National Eisteddfod of Wales at Dyffryn Park. High angle shots of the ceremony in progress. Princess Elizabeth (later Queen Elizabeth II), dressed in ancient robes, is led to the Arch Druid to become a bard, everyone applauds her. M/S as a lady-in-waiting adjusts the ancient head-dress for Princess Elizabeth. She walks from the ceremony. C/U of Princess Elizabeth dressed in the robes of a novitiate. M/S as the Arch Druid drinks from the "Horn of Plenty". C/U individual shots of various druids in the ancient white costume of the calling.
https://www.britishpathe.com/video/princess-a-welsh-bard