It also includes its own YouTube Web player for YouTube videos with definable minimum and maximum durations before sleep. Sleep# works with VLC media player, Windows Media Player, Google Play Movies & TV amongst others. 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# sends your computer to sleep after the playback of full screen video, providing Windows has been idle for a predefined amount of time. But you need to remember to do this every time. The solution for many is to use a sleep timer to send the computer to sleep after the estimated amount of time of the video.
In these cases, Windows' sleep functionality is suspended and won't kick in once the video has finished. Do you use your computer for playback of films, streamed TV etc.