This section is optional but highly recommended. Indeed it's madVR that will take care of displaying the video and it's it who provides the best quality. Be careful though that your graphics card is powerful enough.
Unpack the archive of madVR into a folder anywhere you wish on your HDD. Double click the file Install.bat. As the message says do not move or delete the madVR directory.
To configure madVR launch a video, right click on it, go to Filters then click on madVR. In the window that appears click Edit Settings. This will appear the madVR settings window.