[2] In the summer of 2010, Demmou was again linked with a move away from his club, this time to USM El Harrach.
[3] SA Mohammadia put a 5 million Algerian dinars price tag on the player.
[4] On May 1, 2011, Demmou was a starter for USM El Harrach in the 2011 Algerian Cup Final against JS Kabylie.
MC Alger won the Final on 2 May 2016 against NA Hussein Dey (1–0).
Demmou was called up to the senior Algeria squad for the 2017 Africa Cup of Nations qualifiers against Seychelles on 2 June 2016.