Solution for this is you create new description:
Provider: YouTube - mobile (you can put here any name you want, as long as it is unique).
Tagoption: youtubem (you can put here any name you want, as long as it is unique).
URL:
http://m.youtube.com
Regex URL: http:\/\/m\.youtube\.com\/watch\?.*v=([a-z0-9-_]+)
Regex Scrape (leave this empty)
Embed: <object width="660" height="400"><param name="movie" value="http://www.youtube.com/v/{vb:raw code}?fs=1&hl=en_US&rel=0&hd=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/{vb:raw code}?fs=1&hl=en_US&rel=0&hd=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="660" height="400"></embed></object>
(put here code you already use on your forum for other YT videos, so you have uniform videos in your posts)
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