Last month Yahoo! killed off it's very popular WebPlayer. Since then a number of people have been trying to hack the existing code (but modified to use their own servers, not Yahoo!) to keep it working. Most have failed.
Enter "Joe" - a webmaster who as of yesterday apparently has managed to do it. He posted his findings here http://ericdin.com/rip-yahoo-web-media-player/ and as proof, offers a link to one of his websites, http://seandalip.com/. Joe has promised a tutorial. The world waits with bated breath.