video material in general, not games. Prerendered cut scenes on games might be 4:2:0 as well - it's really about the codec used.1) When you say Bluray is 4:2:0, is that just movies/TV shows on Bluray, or does that mean everything on Bluray, including video games?
DVD is 4:2:0 and so is all broadcast video material (cable, satellite and terestrial). Also all streaming media.2) Along with Bluray, what other video content is 4:2:2 or less?
not per se, but maybe there's a ms added at some point - who knows?3) Does SDI or HD-SDI have input lag?
with a simple D/A converter there's no lag. "Higher" end converters that possible offer scaling or other features will add lag though.4) How much input lag do you get from converting HDMI to RGB/YPbPr?