Here are two short videos: One describes the registration procedure, and the other shows how to submit your contest entry after you have registered.
To start a video, click the Play icon ▶ at the left of the control bar at the bottom of the video image. The Play icon changes to the Pause icon ⏸ when the video is running.
Click the Pause icon to stop the video--you may have to move your mouse over the video image for the control bar to show up.
Click and drag the small white dot in the control bar to move to different places in the video.
You should hear the audio. If you don’t hear anything, click the Speaker icon and increase the volume with the other white dot in the control bar.
If you want to enlarge the video to full screen mode, click the Play icon and then click the small square icon near the bottom right corner of the control bar. Press the keyboard Escape key (ESC) to exit the full screen mode.