Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: receiving from a presenter local client computer device an iteratively captured screen display of the presenter local client computer device; multicasting the iteratively received captured screen display to a first virtual machine and a second virtual machine, the first virtual machine running a first provider specific web conference client application associated to a first web conference provider system, the second virtual machine running a second provider specific web conference client application associated to a second web conference provider system, and cloning by the first virtual machine and the second virtual machine the iteratively captured screen display to provide respective instances of a cloned iteratively captured screen display.