Thanks for the tip Athena.
Here is some back history.
www.amandalinettemeder.com/blog/witch-dance-the-wolfshger-hexenbrut-peter-fox-and-the-new-dance-craze
at the end of April, the women of Wolfshäger Hexenbrut (in English: The Wolf Hunter's Coven), located in Wolfshagen im Harz, Germany, do something a little different.
They get together to celebrate Walpurgis, a holiday celebrating fertility, celebrations including lots of dancing, foods, and drinking, which usually occurs every year on April 30th.
However, in 2016, their celebrations included a choreographed dance to Schüttel deinen Speck, in English: Shake Your Bacon, by German Reggae-Pop artist, Peter Fox, in 2008
After their video took off, it made waves all around the world.
Their 'Witch Dance' was then picked up by various different covens, pagan groups and Halloween celebrations all over the world, becoming particularly popular with US-based groups.