Web Designer 7 YouTube Widget Not Working

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I have used the YouTube widget for 10 videos on my site when I first put it together about a year and a half ago, and now I am trying to add another video and all I get is a blank white box when I insert the embedded link. I am doing everything the same, and I also notice when I choose custom size for my embedded link, at 250 pixels wide, the height is 188 instead of about 140 for my older videos. What do I need to do to get my YouTube widget working correctly?