The Motion Codecs are based on the huffyuv codec and they contain two components: the Predictor codec and the Mhuffyuv codec.
The Predictor codec uses a predictor algorithm and it provides fast lossless compression but without reducing file size too much.
The Mhuffyuv codec is based on the original huffyuv codec, which has been modified to support motion compression.
The Motion Codecs are very easy to install: decompress archives, right click on the INF file and select Install. Ignore any message prompting you that the software has not passed Windows Logo testing and click on Continue anyway.
Then check the installed codec. See Checking Installed VIDEO and AUDIO Codecs In Windows XP
The Motion Codecs are recommended to anyone preferring the motion compression method and seeking an improved version of the HuffYUV codec.
Since most frames differ very little from the previous, it is easier and more efficient to compress motion than each frame separately.