Não sei como corrigir o erro abaixo. Alguém pode me ajudar?

Uncaught SecurityError: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin "http://mysite.net" from accessing a frame with origin "https://www.youtube.com". The frame requesting access has a protocol of "http", the frame being accessed has a protocol of "https". Protocols must match.