How to lock Phone screen while recording video (Galaxy S4)

[TJ99]

My apologies if this is in the wrong forum. I recently purchased the Galaxy S4 after previously having the Epic 4G. One feature I really liked about the Epic4G was the ability to lock the screen when recording videos. From time to time I would hit a button on accident which would either result in the video stop recording or to zoom in when I didn't want it to, so the lock feature came in handy to prevent that from happening. Anyone know a way to do the same thing with the S4 and lock the screen when the video is recording? or any apps that would do the same? I came across one, "Lock Any App Screen", but it doesn't seem to work very well when trying to unlock it by hitting the four corners.