HandBrake 0.10.5

This is one of the best app to shrink your video files and make them even smaller in size without loosing their quality. 

Click on this link to download the setup file

Also you can validate your download here

HandBrake is an open-source, GPL-licensed, multi platform, multi threaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows.

Supported sources: HandBrake is not limited to DVDs: it will now accept practically any type of video as a source.