Graham Sutherland / PolynomialI suspect there's also something else going on beyond the bit rate reduction, because if you upload a 4K video but watch the 1080p transcoded stream it's nowhere near as bad as uploading a 1080p video and watching at 1080p. my guess would be that they've semi-recently cost-optimised their transcoder in a way that ends up producing worse results for same-resolution conversion.
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