+ }, {
+ 'url': 'https://www.khanacademy.org/math/applied-math/cryptography',
+ 'info_dict': {
+ 'id': 'cryptography',
+ 'title': 'Journey into cryptography',
+ 'description': 'How have humans protected their secret messages through history? What has changed today?',
+ },
+ 'playlist_mincount': 3,
+ }]