In certain Kobiton deployment models, video streaming for Manual sessions employs WebRTC instead of gRPC. Use these steps to check whether an end-user's computer running on a company network (LAN/WAN enterprise network) can use WebRTC with Kobiton.
Step 1: While on your company network, launch a Chrome browser (must be Chrome browser) and go to this URL:
Step 2: Allow Webcam and Microphone accessibility 
Step 3: Leave Location option as it is, click Start Test, and wait 
Step 4: When the test finishes, if all sections are green, the user's company network allows WebRTC. If the Network and Connectivity sections show a red result, expand all other sections and send Kobiton Support a screenshot of them for troubleshooting. 