I added the Template:YouTubePlayer to the wiki. Feel free to add music to your talk pages. Type this down in source mode:

Template:YoutubePlayer |VideoURL = embed/7qrRzNidzIc |Autoplay = 1

remember to type this in these: {{ }}

After "embed/" add your video url (http://m.youtube.com/watch?v=yada yada<==this bit in bold)

Then you're good to go