No, the terms of service (TOS) mandates how and what you can do on their site.

A snippet: " Permissions and Restrictions You may access and use the Service as made available to you, as long as you comply with this Agreement and applicable law."

Not a dang thing in there about "free". Now, you can argue whether or not your saw those terms, or agreed to them, but the TOS are legally binding.

Don't like those TOS, fine, makes no difference to me. But calling those videos "free" is not only naive, but wrong.