Writing 4 consecutive pixels at 0x0 stores those in video memory 64KB apart.
I don't think "64KB apart" would make much sense either, especially because of the flexibility of the VGA memory controller described in the article; they end up in 4 separate 64KB planes. Unless you're referring to the linear view of the framebuffer that post-VGA GPUs use, in which case the mapping between the planes and LFB can differ considerably between implementations: https://stackoverflow.com/questions/36269239/meaning-of-byte...