.... But you need to remember to do this every time. Sleep# handles this automatically:
Sleep# sends your computer to sleep after the playback of fullscreen video, providing Windows has been idle for a predefined amount of time.
There is a grace period at the end of the fullscreen video before sending your computer to sleep, allowing you to interrupt the process should you still be awake.
Sleep# works with VLC media player, Windows Media Player, Google Play Movies & TV amongst others.