Someone kindly supplied the details of the film this shamadan clip's from when it was on the YT channel. Unfortunately all the details were in the comments section and have been lost. Any clues?
The clip is set in a hamam (bathhouse) during Layl al Aroosa, the night (or two nights) before the wedding ceremony, The bride takes a ritual bath and henna's applied to the bride and everyone else. Its all considered a bit old fashioned now particularly as every house has its own bathroom and there's no need to go to a communal bathhouse. My experience has been that henna artists come to the house where all the ladies have gathered. During the henna there's food, music (if the music is live the musicians are always female), lots of dancing and joy.