HTC One M8 for Windows - Manual (Page 132)

Taking a photo while recording a video — VideoPic
Choose Normal scene to use this feature.
While you're recording video using the main camera, tap to capture a
still shot of your subject.
Using auto focus while recording video
Want your camera to automatically focus wherever you point your
camera?
You can only turn on auto focus before you start recording with
the main camera.
1. On the Viewfinder screen, tap to show the camera options.
2. Tap , and then set Lock focus during recording to off.
132 Camera