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.
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.
My doll is in the Wassail bowl I found in a charity shop. She's a vintage tree angel, although only about 40 years old and made of plastic rather than anything antique. To decorate her, I went into the garden and picked ivy. I couldn't find any holly with berries on it - or mistletoe - but I did find a tiny rosebud that had remained undamaged despite the morning frost. I picked that to put in her hands.
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/
You can find out more about other doll traditions in folklore and witchcraft in my book Pagan Portals - Poppets and Magical Dolls. It is published by Moon Books.