As I read the information, It was encrypted in a similar fashion but not necessarily identical. Specifically I suspect a different crypto system was used but it still only rotated lines in the video. They used image processing techniques to restore the only partially garbled image, the did not break the underlying crypto nor did they recover the key. The may not even understand which underlying Crypto algorithm is used to decide how much to rotate each row. They break the system without breaking the crypto, which is common.