How hot is too hot for the CPU temp? I've got smcFanControl installed on my MBP and watching YouTube videos in 720p really starts heating up the computer fast. And it's not always the 720p setting that's totally responsible for the temp. The better the camera, the hotter the MBP gets. Some channels I can't even watch in 720p because the camera used is too good and the picture is too clear. I start getting nervous when the CPU temp gets to 180 Fahrenheit (82 Celsius). At 93 Celcius, the fans start coming on strong in the 5000 rpm range. I usually stop the video at that point and change the video setting to 480p. I can't relax because I'm always worried about burning the computer up.