Sets the temperature of the camera at which the camera turns off automatically during shooting. When it is set to [High], you can continue shooting even when the temperature of the camera gets hotter than normal.
MENU → (Setup) → [Auto Pwr OFF Temp.] → desired setting.
Ambient temperature: 40°C (104°F) Continuous recording time for movies (HD): Approx. 29 minutes Continuous recording time for movies (4K): Approx. 29 minutes
https://www.youtube.com/watch?v=xxGl9Tl6Sao Update 1: Since I didn't have any sporting events to shoot today, I just ran my typical 4k recording overheat test. I disabled "extended temp" option, kept the screen on back and recorded a YouTube video. The camera recorded a full 30min, then it overheated and shutdown 16min into the second run. [Go to my Instagram: http://geni.us/wwF9 and check the IG Story]
Update2: I did the same test but activated "extended temp" the camera DID NOT shutdown for almost 2 hours while recording 4k. I stopped the test after 2 hours. This is a good sign, but the indicator was on after 30 minutes.