YouTube embedded video: set different thumbnail

Question

I want to embed a video from YouTube that is not mine (so I can not change it at YouTube). The video has a thumbnail that is not representative for the video (I refer to the

Answer 1

There's a nice workaround for this in the sitepoint forums:

Note: To prevent having to click twice to make the video play, use autoplay=1 in the video embed code. It will start playing when the second div is displayed.