[LigH]

1. x264 8 bit encodes video in the MPEG-4 AVC Main/High Profile with internal quantized components of 8 bit resolution; x264 10 bit encodes video in the MPEG-4 AVC High 10 Profile with internal quantized components of 10 bit resolution. The latter is specifically known to be useful for cartoon video content. — NOTE: Not every player is capable of playing High 10 Profile AVC video.

2. They are not VfW codecs, but provided by a separate collection of encoders based on ffmpeg's libavcodec library, so they are independent of any codecs installed into your Windows system. Similar to the decoders in VLC. VDub2 contains ffmpeg based decoders, too