Chameleon Social Network script - repost

I need someone to add a Button call "Post" so when a user wants to post comment he or she click on post instead of just pressing enter key to submit that particular comment. Second, like facebook the "what's on your mind" box allows you to simply paste the link of news or a youtube video and it automatically download a preview for you. My website does have a "what in your mind feature" for those of you familiar with chameleon, however pasting a link in the time line does not give you the same result as facebook. I want to be able to see preview as soon as I post a youtube link or new link from another website.