Is there a way to watch live tv on the RTE Player (Irish TV) using Norton VPN or do I need to ditch it and get another VPN?
Are you getting an error message when you try to access the site with the VPN active?
A VPN does not block or filter any web content. It is the website you are trying to access that is probably blocking access from known VPN IP addresses. This is done for copywrite, legal or political reasons. There is nothing a VPN provider can or should do to bypass the site’s protection for its content.
Here is a How to Geek article on this. https://www.howtogeek.com/403771/why-do-some-websites-block-vpns/