Hitler receives a phone call from Zod

Footage is from:

Downfall (Der Untergang), property of Constantin Film

Superman II, property of Warner Bros. (...if I'm not mistaken. At least I THINK that's who owns it).

This is a parody, and parodies are fair use according to this:

Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.