For taking the exam on ProctorU it is necessary to turn on the video sharing. But if you are facing issues in allowing the video sharing and if your equipment test showed that port 1935 is blocked then it is possible that your network has blocked port 1935.
Port 1935 is a necessary port that is used for the transfer of video sharing over your network connection. And it can be blocked by your network administrator.
This is where PureVPN comes in handy as you can set up PureVPN with Port Forwarding and take your exam like a boss!