Might be hard to do, I notice when you select video (HDR) is autostarts recording, which might give you alot of unready video as you handle the phone and setup the shot, That being said I tried this The DNA has Tourist mode, which means you are in the camera app and hit the poweroff button, if you then hit the poweron button the camera app is open already (so you can walk around as a tourist and turn the screen off between shots).. but when it powers on it reverts to the photo mode not video. There are a number of other camera apps avail, you might check some of those out I'm not a big fan of the stock HTC camera software