Joan55, where are you trying to watch it through? iptv simple client in Kodi? If so, you need to input the m3u playlist that Kens created. It matches the channel names on the xml file and the github link. If you downloaded your own m3u playlist from the website, none of these xml's will work or the github links until you edit the channel names from your m3u to match the xml info. You can use notepad++ to edit the m3u.
Hope this helps.