Assuming this wasn't a case where an insider broke into security and installed a transmitter onto a specific video feed, isn't there an argument here as to who

Assuming this wasn't a case where an insider broke into security and installed a transmitter onto a specific video feed, isn't there an argument here as to who owns a presumably unencrypted RF signals? No. Most gambling locales have a law against the use of hidden electronic devices to assist play. It has nothing to do with airwave rights.