The Yao people tribal cousins of the KUNDA speaking people 

This dance is known as Chindimba. In many cases, it is Yawo chiefs who perform this dance.
The dancers hold mchila- whilsky in their hands to show that they are free people. In Africa, mchila represents freedom- mtendele/mtunjelele/umutende
In the past years before the Yawo embraced Islam or Christianity, Chindimba was performed during the funeral ceremonies.
Video from Mr. Zulu Daniel