Really??? In Maine this past week, on Wednesday morning at Portland Head Light in a little over 90 minutes, 430 raw stills, 8 ~ 1 min 4K videos (29.97 fps) 55% battery capacity remaining no over heating, air temp ~ 73 degrees. 4K 29.97 FPS . I'm not a video expert but I had no issues
that might be not in HQ mode. standard 4K 30 is not limited by heat.