Vidyo stopped supporting the Vidyo Desktop on Linux, then we developped our own WebRTC client based on the Vidyo API, but that one got depracated as well.
Current supported Vidyo client for Linux is Vidyo Connect WebRTC client provided and supported by Vidyo.
You can access Vidyo Connect WebRTC client at http://vidyowebrtc.cern.ch/web/index.html from Firefox or Chrome browser.
If you are on Linux platform and you want to join Vidyo from Indico
you will be redirected to the client selector