Question: what is ycbcr vs rgb?
Answer: Ycbcr is a a signal format different from RGB and meant to be more efficient. Ycbcr has Luma (brightness) information separate from chroma (color) which allows the subsampling of the latter (4:2:2 and 4:2:0) for more bandwidth but when you use 4:4:4 its virtually identical with RGB.