Generic USB redirection is the only method available to redirect the Imaging devices in RDP and UXP protocols. The Imaging devices device class includes (among others) the web cameras and document scanners. 

Note: Although the document scanners fit into the Imaging devices category and the Generic USB redirection is currently the only available redirection method for them, they are known to be one of the most challenging devices to redirect. NComputing cannot guarantee that the document scanners forwarded with the Generic USB redirection will work properly. This especially applies to RDP sessions.

What needs to be considered is the fact that the redirected device (especially web cameras) produce big amounts of raw video data. In network bandwidth constrained environments the possibility of some video frame drops must be taken into account.