Comment by re9

Some still cameras with video features also do actually lack in heat dissipation department and may really shut down because they overheat. Sometimes earlier than said 30 minute limit kicks in.

And say you use slow memory card in your otherwise capable camera... I have one here, which is allowing me to capture, depending on subject, 4-15 seconds of video. It just cant write stuff onto memory card fast enough and fills its memory buffer and then its done. With proper fast flash card, same camera runs up to 29:59 and with certain tweaks, until flash card is full.