the doctor in is 's most recent propaganda video has been identified .
tareq kamleh refers to himself as abu yusuf al-australi in the film .
he calls on foreigners with training to join the isis health service .
kamleh was identified after the propaganda film went viral .
colleagues said he was a ` womaniser ' who drank alcohol regularly .
they also said he showed no signs of defecting to the militant group .
he studied at adelaide university before continuing his work in peadiatrics .