You can have acces to the webinars navigating to the top menu and then going to 'Knowledge'. On the 'Knowledge' page you will find the section 'Webinars'. All webinars are free.
If you want to learn more about any specific topic, click on "Go to webinar". To gain acces to the content you need to click on "Pre-register". Afterwards, you'll be contacted with further details about the webinar in a separate e-mail. The link with the access to the webinar will be available on the webinar page shortly before its start.