What kind of plane was that?
Many reports claim it was Caspian Airlines Flight 7908, a Russian-built TU154M that crashed 16 minutes after departing Tehran, bound for Armenia, on Wednesday, July 15, 2009. 168 SOB, all were killed in the crash.
There are other claims, including from the BBC, that it was an IL-76MD that went down after a mid-air collision with F-5E Tiger II at an airshow in Tehran on September 22, 2009. That crash killed all seven crew members on board.
(Other reports claim this crash was caused by an inflight engine fire and structural failure of the over-fuselage radome.)
With all the various parts that have ceased flying in formation with the rest of the airframe, it's kind of hard to tell what it was in the video.