This is a confusion of terms. By "recording" people can mean both writing data to the card and activating the sensor to receive information. The latter is what

This is a confusion of terms. By "recording" people can mean both writing data to the card and activating the sensor to receive information. The latter is what overheats a camera, and the process is the same for both sending data directly to HDMI or recording it to a card. Some older sensors on Canon digital SLRs would actually begin to burn themselves out just by having the screen display what the sensor was receiving (also known as "live view") for more than about 10 minutes.