The copyright is that of the content producer. The broadcaster has the responsibility to respect the copyright. The courts have ruled that time shifting is legal yet sharing is not. We have not aggreged to the TOS so we do not need to abide by it. If the broadcaster dose not want others to view there content they can prevent this via technology. Commercial skipping has been ruled legal if the view takes an action. Automatic commercial skipping has not been ruled on.
I agree it is great that there are people that make the effort to provide ways for us to access content. By the way, an antenna is hardly perfect, even when you usually get good reception.