^ This. Also, honestly, I've been super satisfied with how mine performs once I tweaked the internal settings. You gotta change the Auto Power OFF Temp to High in the setup menu. The default setting is way too cautious and shuts the camera down long before it's actually in danger. It basically just protects your hands from feeling the heat, it wont actually hurt the sensor. Another thing that works well is just keeping the LCD screen flipped out and away from the body. It helps dissipate the heat much faster since that back plate gets quite warm. I've been using the Sony CEA-G160T 160GB CFexpress Type A Memory Card and it seems to run a bit cooler than my old SD cards did during long bursts. If you're doing a really long shoot and want some extra peace of mind, adding a SmallRig Camera Cage for Sony Alpha 7S III actually helps pull some heat away from the body. It acts kinda like a heat sink. No complaints since making those small changes, it's been totally reliable for me. Happy to walk you through the menu if you cant find the toggle.

From what I know, overheating can be a common issue with many mirrorless cameras when shooting 4K video, especially at higher frame rates like 60fps which generate more heat. Some potential things that may help extend recording times:

• Avoid shooting in very hot environments if possible
• Give the camera breaks between long recording sessions to cool down
• Use an external recorder via HDMI output to offload processing from the camera
• Ensure the camera has good airflow and isn't covered or in an enclosure
• Use a cage or plate that acts as a heat sink to draw heat away from the body
• Some users modify the camera with additional heat sinks or small fans
• A dummy battery connected to an external power source may generate less heat