The flash issue is so much deeper than a means to watch video and even though the mobile phone world find it easy to focus on video an banners flash is actually an extremely capable media development tool.
Most interactive Internet based games are based on the flash platform and Facebook is a prime example.
The majority of users want to go to there favourite website and see a video of clip and play it. HTML 5 isn't needed to do that or to be the replacement for flash video. Most phones play mp4 and h264 based video files so if anything the issue is laziness not whether we need Flash or not.
YouTube has alternative format options and has done for years now. Google owns webm so why isn't it the Android defacto video format?
The sites we know and love need to make the changes and if they use youtube as there video server then they have no excuses. Hint to the mobile nations network.