Windows Media Components for QuickTime

Windows Media Components for QuickTime, also known as Flip4Mac WMV Player by Telestream, Inc. was one of the few commercial products that allow playback of Microsoft's proprietary audio and video codecs inside QuickTime for macOS.
It allowed playback of:
It also included a web browser plug-in to allow playback of embedded Windows Media files in web pages.
With the components installed, any QuickTime-compatible application is able to directly play WMV content. This includes the official QuickTime Player by Apple as well as countless third party players. WMV Player also allows Windows media files to be associated to QuickTime Player.
On January 12, 2006, Microsoft discontinued support for Windows Media Player for Mac OS X and began distributing a free version of WMV Player as Windows Media Components for QuickTime on their website. As of June 2015, there is no longer a free version of this application offered. Flip4Mac was retired as of July 1, 2019. "If you are a current user of Flip4Mac, or your Flip4Mac stopped functioning when up upgraded your operating system, we invite you to take a look at Switch." 