Written script at the start of the video dates it to earlier in April, and he can be seen sitting cross-legged on the floor giving an address to several aides with their faces covered.
The speaker looks like a slightly older version of Baghdadi than when he was pictured in 2014, addressing followers from a pulpit to declare a caliphate stretching across Iraq and Syria.
In the footage released on Monday, he is dressed in black robes and a beige waistcoat, with a long greying beard dyed red at the bottom. The authenticity and date of the recording could not be independently verified.