Believed to have been made some weeks ago in Syria, the video, which has been reported by the ABC, featured an Australian by the name of Abu Yahya ash Shami and another by the name of Abu Nour al-Iraqi.

The mostly English language video titled "There is No Life without Jihad" was apparently posted online by members of the  Islamic State of Iraq and the Levant (ISIL) group which is fighting in Syria and Iraq and are threatening the capital Baghdad.

Australian and Americans are urged to join the fight by the men who say the reasons are "plenty". The video shows men carrying weapons walking bush and attending meetings.

Subtitles on the video indicate that Abu Yahya ash Shami who is believed to have come from Sydney was killed some time after the video was made.