Dr Stephen Napoli, co-owner of the Mannum Medical Centre in South Australia, recognised the man in the video as Dr Kamleh, who was an intern at his practice for 10 weeks in 2010.
"As a doctor he worked quite well; he was quite intelligent, he presented to our practice as quite a sound doctor with good medical knowledge," Dr Napoli said.
"There was no indication I'd be worried about his other associations when he was with us.
"There was nothing that I saw of his work as a medical practical that would suggest he would have any of these sorts of views."
Mr Kamleh started as a pediatric registrar at the Adelaide Women's and Children's Hospital in February 2011, where he worked until the end of his contract in January 2013.
A Women's and Children's Hospital spokesman said Dr Kamleh then moved to Mackay Base Hospital in Queensland in 2013.
It is believed he worked in the health system in Perth up until late 2014.
