Abu Amarah blew "himself up in a booby trapped vehicle" as he was fighting among jihadists since 2015 when his father signed him up in a "martyrdom operation".
His family fled to the Daesh-controlled town of Qabasin, situated in the northeastern countryside of Aleppo.
The next episode contains a fire on the Dabeq hill in the northern countryside of Aleppo where the teenage reportedly detonated his explosives.
Questions remain as the video has not been fully verified.
The SOHR said that Daesh took the lives of 350 children out of 1800 recruited in 2015 and at least 48 of them were killed in suicide attacks by using explosive belts or car bombs.