<i>Also, lost in this discussion is the fact that one of the more popular browsers doesn't support HTML 5 in its current version or possibly even its next.</i><p>Not natively, but <a href="http://excanvas.sourceforge.net/" rel="nofollow">http://excanvas.sourceforge.net/</a><p><i>Does streaming video work under HTML 5 specs?</i><p>Yes.