Download it and extract the file. Put the scripts to the 'www' or 'htdocs' directory. Create a database. Import the 'search_engine.sql' file to your database. Go to config folder and open 'config.php' ...
This library requires a working FFMpeg install. You will need both FFMpeg and FFProbe binaries to use it. Be sure that these binaries can be located with system PATH ...