PrecisePlayer can play a lot of audio and video formats. It is very lightweight and easy to use. The only thing you have to do to open a file is to click File and then Open! Then playback will start. Click on the Pause button to stop the video in the current time. Click on the Play button to resume after pause. Click on the Stop button to stop playback.
Requires .NET Framework 3.5.
Very easy to use.
Supports most audio and video formats.
Supports all versions of Windows from Windows XP.
Can have multiple instances opened at the same time.