This bookmarklet is to use when you have a YouTube video with rubbish parameters in its URL (such as 'embedded', 'related',...), and you want it in its standard URL, for example, to share it in social networks. You just press it as you are in a YouTube video page, and it will automatically redirect to its standard URL.
Bookmarklet Source Code:
javascript%3Avar%2520strUrl%3Dnew%2520String%28location.href%29%2Cvideo%3DstrUrl.substring%28strUrl.indexOf%28%27v%3D%27%29+2%2CstrUrl.indexOf%28%27v%3D%27%29+13%29%2CisYoutube%3DstrUrl.substring%280%2CstrUrl.indexOf%28%27%3F%27%29%29%3Bif%28isYoutube%3D%3D%27http%3A//www.youtube.com/watch%27%29%7Bdocument.location.href%3D%27http%3A//www.youtube.com/watch%3Fv%3D%27+video%7D%3B