Abu Bakr al-Baghdadi, the leader of Islamist militant group Isis, has called on Muslims to obey him, in his first video sermon.
Baghdadi has been appointed caliph by the jihadist group, which has seized large swathes of Iraq and Syria.
The video appears to have been filmed on Friday during a sermon at the Al-Nouri Mosque in Mosul, northern Iraq.
The release of the video comes amid rumours that Baghdadi was killed or injured in an attack.