err youre wrong in the start html5 playback does require plugin, but those come within browsers as browser has to have ability for playing certain files (ogg/vp-x264) in other words any browser that wasn't made fully to support html 5 won't be able to even play those videos to me flash is better, but older version as it seems everything above version 10 was simply bloatware cross-system, yup html5 is better but compatibility with older machines/browsers - flash is better