 YUV Formats in the Linux Kernel documentation

Primary source: www.kernel.org/doc/html/latest/userspace-api/media/v4l/yuv-formats.html

Verified locator: §2.7 subsampling discussion distinguishes centered/interstitial and co-sited chroma. The4:2:2 examples contrast the two horizontal locations; the4:2:0 example is horizontally interstitial and vertically co-sited. Sample location is distinct from the memory layout described in the companion planar-format page.