You are not making any sense. You say that Quicktime is outdated technology and has to be banished, yet you are okay with browsers using it to display HTML5 video?
How does that work? On Mac OS X to do anything with video you use QuickTime. QuickTime isn't just the front end software. It provides an API that can be used to create all kinds of software, not only that it allows other codecs to easily be installed (see Perian for Mac OS X).
