[notpushkin]

If I understand correctly, most of what K-Lite / CCCP did was wrapping libavcodec/libavformat for the Windows APIs, so native players could use them. VLC just ships with libavcodec included, so it supports all these formats. Not sure about MPC-HC nowadays (it used to use Windows APIs, but you’d usually get it with your codec pack installer anyway).

[plorkyeran]

K-lite originally was a giant mess of stuff that gradually got pruned down as the libav-based things got better and covered more of what was needed. These days it's just mpc-hc plus lavfilters and a few incidental tools.