The video was released by its Wilayat Fallujah, which encompasses the city of Fallujah and other nearby towns and villages west of Baghdad. Wilayat Fallujah is one of three wilayats, or states, that make up the Iraqi province of Anbar. Wilayat Fallujah is joined by Wilayat Anbar and Wilayat al Furat (Euphrates Province).
The video details the Islamic State manufacturing several mortar rounds, rockets, and warheads for these weapons. The facility is shown in a reporter fashion and at the end, the terrorist group showcases these weapons by firing off some of the rockets. The group has named these rockets the "Fatah" rockets.
This weapons manufacturing facility is similar to one that was shown last month in Babil Province. In that video, mortars, shells, and rockets were also shown being manufactured just south of Baghdad. These videos showcase that the Islamic State, like other groups, are able to internally develop weapons to be used on the battlefield.
These Do-It-Yourself weapons have become commonplace in Iraq and Syria and especially in the latter. Syrian rebel groups and the al Qaeda-affiliate Jabhat al Nusrah regularly post pictures and videos showing DIY mortars, rockets, and armored vehicles. The Kurdish forces are widely known to create their own DIY tanks, as well.