This is a spill over from my anime/hentai interests but if you download alot of video files then CCCP is nice to have installed as it pretty much eliminates the need to keep searching for codecs.

Quote:

CCCP was created to replace the video playback packs provided by several anime fansub groups in favor of a single reliable pack capable of decoding practically any groups' files - without breaking compatibility for other formats. Since then it has grown into a pack that can decode more or less anything that you will run into during your travels on the internet.



http://www.cccp-project.net/
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Fap, Fap, Fap