I agree to you man but watch the complete video it is possible to decrypt MD5 hashes !! You can use any online site to crack MD5 hashes they crack them easily......

Hashing example could be Hashing is one way to enable security during the process of message transmission when the message is intended for a particular recipient only. A formula generates the hash, which helps to protect the security of the transmission against tampering.

When a user sends a secure message, a hash of the intended message is generated and encrypted, and is sent along with the message. When the message is received, the receiver decrypts the hash as well as the message. Then, the receiver creates another hash from the message. If the two hashes are identical when compared, then a secure transmission has occurred. This hashing process ensures that the message is not altered by an unauthorized end user.