Video released 21st March 2016 through Furat media titled; (see below)
“Pledge of Allegiance From Katībat Jund al-Tawḥīd of Jamā’at Abū Sayyāf in Sulu, Philippines to the Caliph of the Muslims Ibrāhīm Bin ‘Awād al-Ḥussaynī al-Qurayshī”
In the seven minute video a dialogue is presented by a script reading militant who stands surrounded by a dozen, perhaps more, black clad individuals doing their best poker face stare.
Daesh t-shirts, flags and even embroidery patches can be seen adorning the collective as they pledge allegiance to Daesh.
Sulu is part of an archipelago in the Philippines (wiki) and has a long history of trade. In 1898 the Spanish – American war took place which led to the 1898 Treaty of Paris and the American occupation of the region which ended in 1946 with Philippine Independence.
No celebratory gun fire as ammunition is expensive.