1.Use VLC/KMP Player to play ".mkv" / ".AVI" file !

2.For ".rmvb" format movies: Download Real Alternative Player to play or You can use Real Media Player.

Real Media Player Download

3.Some files have "rar" extension for which you require "WinRAR" to extract the movie.

4.Some files have ".001" extension for which you require "HJSplit" to extract the movie.

5.Some files have "._a" extension for which you either require "FFJS" to extract or else rename the extensions to ".001, .002, .003...."

6.Some files have ".a00, .a01, .a02,..., .alz" extension, for which you have to download "ALZip" for extracting the movie.

7.Some files have ".vnw" extension in the end. For such files, create a back-up in some other folder. Now rename one set of files to ".rar" and use "WinRAR".