It isn't Quicktime, it is Apple's pseudo proprietary streaming protocol that they use.
" ... Apple uses HTTP Live Streaming technology (HLS) that is part of QuickTime, Safari, OS X, and iOS. It's a protocol implemented by Apple and suggested as a standard, but it's not one that many other companies have used widely ... "
http://www.theverge.com/2015/8/27/9216299/apple-iphone-6s-event-windows-10-stream
The Edge browser gives in and and supports HLS. This doesn't work on other browsers on OS X either. ( iOS you have no choice but to use Safari or Safari's core engine with a slightly different interface on top)