Videoconference will be available after opening the link:
https://6253778.vidyocloud.com/join/LGa2TdM6ib
using the program "Vidyo". In order to test Vidyo before the conference, you may consult the CERN pages:
http://information-technology.web.cern.ch/services/fe/vidyo
and especially:
http://information-technology.web.cern.ch/services/fe/howto/users-test-your-setup