I read almost all the threads on the forum, trying to find an answer to my problem, but i couldn't.
So, the problem is:
I installed multimediabox, and create an article with the correct code.
On Firefox is all ok - I have a jpg thumb and then i click on it, and the video from youtube appears.
But on IE 8 - the jpg thumb don't appear. Just appear a little square, instead of the image. But when i cllick on that little square the video from youtube is working too.
Can anyone help me.