adding comments to the site

[login to view URL] If you click on "All Videos" you will see the list of the videos displayed. 1. We need the videos to be sorted by latest first, not as they are sorted now. 2. When you click on each video, it loads in a new page, where you could view it. We need to add comment/rating feature to it. I.e. a user should be able to add a comment/rate a video below the video. - The form to leave a comment should be on the same page (no redirect to other pages to fill out the comment form) - Form should include captcha - There should be admin side, so admin will be able to delete comments. Preference would be given to those who will be able to do it asap.