madVR is the best video renderer and I will show you the settings to obtain the best quality. This section is optional but highly recommended.
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.