 Throws away some color data (0:0:0 is no chroma sampling. 0:0:0 is some chroma subsampling.0:0:0 is lots of chroma subsampling). Bad if you're doing color-correction. Really bad if you're doing green screen or VFX work.  Throws away some color data (0:0:0 is no chroma sampling. 0:0:0 is some chroma subsampling.0:0:0 is lots of chroma subsampling). Bad if you're doing color-correction. Really bad if you're doing green screen or VFX work. 