Click the Play arrow in the center of the video to start playing the video. Move your pointer across the video to display the following icons at the bottom of the screen.
Click the Pause icon to stop a video that is playing.
Click the double arrows to make the video fill your screen, or to return it to its regular size. The Esc key will also exit the full-screen mode.
Press the Play button to restart the video. Drag the round white dot to play a particular part of the video. The changing time display lets you drag to exact second you want.
Drag the white dot after the speaker icon to change the sound level. You can also control the overall sound using your computer's control