want to shrink folder to half.

[man with 300]

recently i have seen vedios with my friends,which re shrinked to half its size.the vedio real size is 1.5gb,but they have it as 800mb.does can any one tel how to do it?

[raksrules]

Convert to Divx / XviD / Rmvb and you can achieve good compression ratios with little noticeable loss in quality.