MakeInstantPlayer

MakeInstantPlayer is a free, open-source application for Windows to transform your videos into executable files. This makes it so double-clicking on your videos lets you watch them even if you don't have a media player installed on your computer.

MakeInstantPlayer uses MPlayer to play videos. It supports most of the common video formats, meaning you shouldn't have to worry about downloading and installing codecs.

It has different options for customizing the way a video is played: you can choose either compact or fullscreen video, automatically close the player when the video ends, open a website when the video ends, make the video play in front of all your other windows, loop the video, or show a custom image while the video is loading.

This makes MakeInstantPlayer the perfect option to break your video files' dependence on a video player.