Although it might appear like some sort of Communist software, CCCP is actually just a pack of codecs to help just about any video run on your system.
The full title is the "Combined Community Codec Pack". In reality, it's more like a filter pack than a codec pack but the developers say that "filter doesn't begin with C and we wanted a good acronym"! The developers also like to point out that the name is also a pun on a Russian name which is transliterated into the Latin alphabet as "Soyuz Sovietskikh Sotsialisticheskikh Respublik", or "Union of Soviet Socialist Republics", abbreviated as "USSR".
Anyway, the Combined Community Codec Pack was created to replace the filter packs provided by other groups which simply often did not work properly or broke compatibility for other formats. In reality, Combined Community Codec Pack is an extremely powerful Codec pack, playing back effortlessly most popular formats and some unpopular ones too. There are now fiddly options to get it working although if you have other codec packs installed, you may experience some conflicts or significant slowdown in reproduction of your films.
However, overall, Combined Community Codec Pack is an impressive pack which deals with just about anything and I quite like the attitude of the developers and their ironic communist branding.