I think it has to do with HEVC h.265 codec & HW acceleration support available to the browser in the respective platforms. https://caniuse.com/#feat=hevc https

I think it has to do with HEVC h.265 codec & HW acceleration support available to the browser in the respective platforms. https://caniuse.com/#feat=hevc https://caniuse.com/#feat=hevc Not sure why Chrome doesn't support HW for it though albeit Chrome OS. My Celeron N3060 Chromebook can decode it. I read Netflix has started using VP9 for streaming, newer CPU's have VP9 decoders in them.