Play Buttons:
Reverse Frame by Frame, hold down for continuous frame by frame
Play/Pause
Forward Frame by Frame, hold down for continuous frame by frame
Play video real time (100%), 3/4 (75%), 1/2 (50%), or 1/4 (25%) speed. Tap the left side (minus) to decrease speed, tap the right side (plus) to increase speed. Defaults to 50% when syncing videos.