In 2016, UCSB purchased a site license for Zoom. We believe Zoom is better, easier to use that the competition (gotomeeting, skype, skype for business, blue jeans, uberconference, ....)
To use Zoom, just login to https://ucsb.zoom.us
There is additional documentation at that site.
There are clients for Mac, Windows, ChromeOS, your android and ios mobile devices.