I hate VICE-CIA News, but they do have some good segments. This shows Shia militias, independent of the Iraqi government, fighting against ISIS in Anbar Province, Iraq. They fight alongside Sunni tribes here and they seem to have good relations with each other, which is very heartening. It seems some of these Shia militias get along better with the Sunni tribes than the government forces do. The government forces are often hated by the Sunni locals for a variety of reasons. However, the Iraqi government refuses to arm these militias, so they have to get all of their weaponry on the black market. They apparently share some of this weaponry with the Sunni tribes. Unfortunately, the Iraqi government does not seem to be helping the Sunni tribes much.
The area is Amiriyat al-Falluja, ~25 miles southeast of Fallujah on the Euphrates River. I am familiar with the area.
There is some really cool live battle action in this video, mostly with small arms.