When adding a youtube/dailymotion video in a newsletter, all seems to be fine in the editor (youtube or dailymotion image inserted...)
But when viewing the newsletter, we only have this code :

<object width='480' height='385'><param name='movie' value='http://www.youtube.com/v/-4bPaW8KBQ'></param><param name='allowFullScreen' value='true'></param><param name='allowscriptaccess' value='always'></param><embed src='http://www.youtube.com/v/-4bPaW8KBQ' type='application/x-shockwave-flash' allowscriptaccess='always' allowfullscreen='true' width='480' height='385'></embed></object>

No flash video reader...