In the clip, which was taken on Wednesday, Mosley can be seen next to a marina in the village of Pedi, and is walking towards rocky hills.
As reported by the Mirror, helicopters, drones, dogs and a number of emergency responders continue to scour the Greek island.
Meanwhile, Mosley's wife has spoken out as the search for her missing husband entered a fourth day. In a moving statement, the first released publicly since her husband went missing, Dr Bailey Mosley said: "It has been three days since Michael left the beach to go for a walk. The longest and most unbearable days for myself and my children.
Eleftherios Papakaloudoukas, the mayor of Symi, has said he will continue the extensive search operation which has involved police, firefighters with drones, and divers. Speaking through a translator, the mayor of 22 years questioned how anyone could survive in the heat that topped 40C on the day the 'Trust Me, I'm A Doctor' presenter vanished.
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