HTML5 Video Stack
Play mp4, webm and ogv videos in modern HTML5 browsers, even use a special video for iPhones. Browser which don't support HTML5 at the moment can use a Flash fallback!
MonsteRSS Stack
MonsteRSS Stack will let you embed a RSS feed on your site. There a lot of options to customize the styling and animation like fade-in, ticker or rotation effects.
YouTube Stack
Play YouTube videos on your own website. You can choose between videos, playlists and a list of user uploaded videos.