Type in a command, or "ls dictionary" to search all commands for "dictionary", etc.

man http://www.dailymotion.com/video/x4gydre

No manual entry for http://www.dailymotion.com/video/x4gydre.
To search for "http://www.dailymotion.com/video/x4gydre", try typing ls http://www.dailymotion.com/video/x4gydre.