This is a clip of musicians who are a accompanying Tannoura (skirt) "Sufi" dance at al-Azhar park. This clip focuses on the munshid (singer), percussion players and the kawala (flute) player but there are young dancers whirling in colorful skirts just outside the camera frame. See Jim Grippo's video of another performance in 2005 to get an idea of the full performance: YouTube - Tannoura "Sufi" dance, Cairo 2005
Though these performances are billed as "Sufi" there is no reference to any specific tariqa (Sufi brotherhood) which is usually important to Sufis. A very intriguing example of staged sacred/folkloric Egyptian performance with great music and dance.