The Family History Library offers both classes and webinars. You’ll find details at the Classes and Webinars page in the FamilySearch Wiki. Here you can participate in upcoming events as well as view past webinars.
The March schedule is a PDF file that shows both classes and webinars.
These webinars are presented using WebEx Meetings platform. It requires the WebEx Meeting browser plugin to operate. This is a free download but requires either the Chrome or Firefox browser (both are free) to operate. It will also operate with iPhone, iPad and Android mobile devices. You’ll find details on these requirements and how to install the plugin at Cisco’s WebEx Meetings FAQs page.