I've heard several complaints, though, about the related videos that show up after the video is done playing so I put together this very simple plugin that keeps YouTube oEmbed code from showing related videos..
On activation, the plugin clears the oEmbed cache so that the videos can be re-cached with the new setting.
If you are upgrading the plugin, you may need to deactivate, then reactivate it to clear the cache...
If you want to pass in some other parameters to the embedded url, you can do so with the filter.
Nothing beats the feeling of installing plugin that does what it says it will do after struggling to the find the right code for hours, blah to do what this little gem just does for you..
Thank you dev, may you be showered with fame and fortune for your hard work and gift to the wordpress community...
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
Allow &autoplay=1 on the original url to be passed through to the oembed. 1.4.1.
Ease matching restrictions to allow more querystring elements to be passed through on original url. 1.4.
Added wmode=transparent to the url structure. 1.1.
Read more