[ajanuary]

It's not common, but the product my work makes uses it as a cross-browser, cross-platform (Windows and OS X) way of embedding video into a web page with good scrubbing and multitrack audio support.

We're replacing it with native HTML video, but comparing the number of workarounds and shims needed to get feature parity across browsers and platforms, Quicktime is certainly the easier choice. It's just not future proof.