In the video below, Shekau burnt Nigerian Flag and hoisted a Boko Haram Flag.
He also lifted a black flag with Arabic inscription as he recited an altered version of the first few lines of Nigeria National Anthem.
He said “I pledge to Allah, my God. To be faithful loyal and honest. To serve Allah with all my strength. To defend his Islam… Allahu Akbar!!
Nigeria is dead; her constitution is dead!! Islam and Islam; war by war upon the Kafir who is the unbeliever.