Cisco Webex sessions can be recorded and the recordings can be saved as WRF and ARF files. There does not seem to be any player for the WRF file format on Linux. If you are using Windows or Mac, you can use the Webex Player here to view the files. There is also a Webex Recording Editor that is available on the same webpage that can be used to render a WRF file to a WMV file. I tried the players and editor on Windows, and they seem to be extremely old Windows apps with basic functionality.