LDAP or Kerberos

Hi everyone, I am struggling on the difference between LDAP and Kerberos for authentication. Actually it looks like LDAP is easier to implement (point to LDAP proxy for both Authentication and Authorisation).

What does Kerberos offer more that LDAP doesn’t, the video is a bit dry on the comparison.

Also does anyone know during a failure scenario (loss of LDAP or KDC connectivity) if the solution fails (I presume so with LDAP) or carries on until ticket expiry (for Kerberos)?