Play Music And Video On Your Blog Using Yahoo Web Player

[Update Feb 2013] Update tutorial to reflect Yahoo!'s upgrade of Yahoo Media Player to Yahoo Web Player.[Update Jul 2013] Unfortunately Yahoo has shutted down Yahoo! WebPlayer, so the service is no longer available. So you want to add music (or video) to your blog? You want it playable right on your blog, yet you don’t want to annoy your readers with an auto-playing, difficult-to-stop audio? Well