OnArcade 2: Youtube downloader
From onArcade Wiki
Youtube downloader allows downloading FLV videos from website www.youtube.com. To access Youtube downloader go to admin panel, click on "Files" in the top menu and then on "Youtube" on the side menu. To download a file simply copy URL of the video (e.g. http://www.youtube.com/watch?v=DXHaCEhOiWU) to "URL" field and click "Grab". Video file, image, title, description and keywords will be downloaded from Youtube server to your server and then you can add video to your site.

