The band of entertainers were from Burkina Faso in West Africa. It was previously known as Upper Volta, and is a former French colony. It's had a pretty turbulent political history.
Here's a couple of short videos to give you a flavour
This adorable baby and her family above were part of the spectators. I just love that these events involve the whole community, and multiple generations of family. I can think of very few occasions other than family-specific celebrations where this happens in my home city....