Peugeot 207 Water Reduction

Hello, My vehicle 207 1.4 Gasoline 8v model started to decrease water since yesterday. It finishes the water I fill in about 10 km. In the same way, the fan does not give hot air, it only gives cold air. I'm adding a video. What can be the problem ? [TUBE] BlDo06NfKfY [/ TUBE]

Hello, the thermostat needs to be changed ..

I think water is leaking from where the thermostat is