LAV Filters is a multi-format media splitter/decoder that uses libavformat to play all sorts of media files. MKV/WebM, AVI, MP4/MOV, MPEG-TS, FLV, OGG are tested and will be registered for. Other formats can be tested using GraphStudio. H264/AVC, H265/HEVC, VC-1, MPEG4-ASP (Divx/Xvid), VP8, VP9 hav ...
RARFileSource is a DirectShow filter to play rar files without to unpack the stored video first. The original version is from OctaneSnail and can be found here. The MediaPortal version fixed a bug, where huge files under a 64 bit OS can't be open and end up with an I/O error.