HTML5 was not put on the map by Apple.
Actually Apple is the reason why there still is NO HTML5 standard. In the first drafts HTML5 should support the royality free OGG codecs. However Apple of course didn't want that web developers could use any free codec because Apple wants them to use H.264 for which Apple gets royalities.
Therefore they denied the HTML5 specs. That's why there still is no HTML final specification.
To quote Apple in the W3C mailinglist (2007):
"We think it is a mistake to require Ogg support, even as a SHOULD-
level requirement."
http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2007-March/010392.html