here are the post rules (to make it all look purty!)
The featured image should be 630px by 280px
any images in posts should have links removed, unless they link to a full size image (like in http://www.pixel-issue.net/?p=847 )
Youtube videos should be in HD where available, and embedded at 630px by 380px
Vimeo videos should be embedded with the iframe code rather than the object code (doesn’t work on iPhone otherwise) and needs to be sized to 620px by 350px.
Also, you need to publish posts with vimeo content while in html mode, because if you publish in visual mode, the iframe code will disappear and there will be an empty space.
When you select ‘play in HD’ on youtube, the video will be resized to 1280 x 1024, so you need to edit the html to change the video size. You can do this in notepad, or in the html editor of wordpress.
<object width=”1280″ height=”745″><param name=”movie” value=”http://www.youtube.com/v/2gvz5Gf1-AY?fs=1&hl=en_GB&rel=0&hd=1″></param><param name=”allowFullScreen” value=”true”></param><param name=”allowscriptaccess” value=”always”></param><embed src=”http://www.youtube.com/v/2gvz5Gf1-AY?fs=1&hl=en_GB&rel=0&hd=1″ type=”application/x-shockwave-flash” allowscriptaccess=”always” allowfullscreen=”true” width=”1280″ height=”745″></embed></object>
All you need to do is replace width=”1280″ height=”745″ with width=”630″ height=”380″