This is the one thing that really irks me about QuickTime. Every time it gets updated it hijacks all of the video extensions in my browser, and even setting defaults doesn’t override it. You have to go deep into the explorer’s tools to find the right radio button to click.
I never install that pos known as Quicktime. Matter of fact these days I only come across two videos a year that need it installed. Piss on that crappy Apple joke of a product
Huh, I've never had it do that, but they do come up by default in the installer as owned by QT, and you have to uncheck them. Interesting...
VLC is your friend. Never, ever install proprietary video players. I even uninstalled Windows Media Player and Media Center. VLC is free and plays every possible video and audio file out there today.