LoadGen supports simulating loads generated by multimedia applications, including video and conference calls if those applications are available in the session that is used for testing.
So if your environment is a Citrix Virtual Apps and Desktops, Citrix XenApp, Citrix XenDesktop, Microsoft Remote Desktop, Microsoft Azure RemoteApp, VMware Horizon or Windows Fat Client environment, then the multimedia applications must be available to test against. You can use validation points to determine if a video has finished playing, for instance. As long as an application supports mouse clicks and keystrokes as input, it can be included in a LoadGen test.