Having previously used HD Flv Player and now needing a more community focused video sharing solution for my website investing in HD Video Share was a no brainer.
Initially I had problems with the component not working correctly in a number of fairly significant ways - including the html5 fallback - but this was all resolved quickly by the support team who bent over backwards to help me.
My only quibble with HD Video Share is the lack of stand alone module or plugin which forces a reliance on HD Flv Player also being installed to display content in content items or as a stand alone module. There is also no common video library between the two components which makes managing videos for HD Flv Player and Video Share a bit of a pain.
Despite the above, the component works really well IF you don't have any issues with the base installation. If you do, an email discussion with Support will no doubt resolve any issues very quickly.