You've probably seen those videos which consist of foreign-language clips that have been complemented (or frequently ruined) by someone's attempt to add hilarious captions to them. Many of them seem to feature a particular scene from a film called Downfall. If you've ever thought that you could do better, here's a great web-based system which makes it easy to add captions to any video that's already on Youtube. Just type in the video's URL, and then enter your captions in the boxes that appear.

You can preview and refine your efforts until you're happy with them, and then publish them on the site for friends and family to (hopefully) laugh at.

To find out more, just head to http://www.captiongenerator.com in your browser.