I've been trying to use the hotkey playback controls for 'Video Source' to Play (hotkey 1), Pause (2), Stop (3), Restart (4). But the video is completely non-responsive to the hotkeys most of the time. It will work occasionally. Another thing that happens, is the video will "Restart playback when source becomes active" even when I have the option unticked. Is this just regular old glitchiness, or am I missing some intricacies of how this feature is supposed to work?