That video is my attempt at a Wassail Cup, or Vessel Cup, Christmas Doll. I love all folklore related to dolls and learnt about this curious custom in The English Year by Steve Roud.
He explained that in past centuries, girls or women would go around houses before Christmas displaying a doll in a decorated box or bowl, singing a wassail song. It was called a Vessel Cup, but that's probably a corruption of wassail, which I've blogged about earlier. The doll would be decorated with evergreens among other things and then covered with a cloth. The carriers asked people if they wanted to see inside, and only reveal the doll if they said yes. Sometimes people would have to pay a coin or two for the privilege.
I think this might be the start of a Yuletide tradition in which I decorate a Wassail Cup Doll every year, and photograph or video her for the blog. If you prefer to see a regular photo of this year's effort rather than the video, I took one of them too and you can see it to the right.
Doing a web search for more information about Christmas dolls, I found quite a bit on the blog In Search of Traditional Customs and Ceremonies: https://traditionalcustomsandceremonies.wordpress.com/2015/12/31/custom-demised-the-vessel-or-wassail-cup/
National Geographic also some information about Nisse Dolls, a Scandinavian traditional of decorating dolls that look like gnomes with red hats: https://www.nationalgeographic.co.uk/family/2020/12/seven-symbols-that-say-christmas-around-the-world
You can find out more about other dolls traditions in my book Pagan Portals - Poppets and Magical Dolls.