How can I mask/hide the link from an iframe?

Hi,
I want to mask the links from my iframes from users so they can't see them in the source code.
I'm using wordpress and I want to mask all my links from my iframes in bulk. Is there any plugin that does that?
For example, I have iframes embeding videos from youtube and I want to mask the youtube URL.

Make the iframe src the destination where you can handle the content delivery.