Hi tabrez,
Thank you for contacting the Microsoft community.
We understand the significance of having a smooth testing experience as you encountered video streaming issues during your exam, allow me to take immediate action to further assist you.
To locate and verify your account, please provide us with the necessary information through private message for us to have this check and review.
For immediate assistance, according to OnVUE FAQ's, if you encountered an issue during your exam, this incident should be reported immediately to Pearson VUE's Support Team, as they have direct access to your scheduled exam appointment and can provide you with alternative options to successfully take your exam. You can contact them via chat or via phone call, just ensure that you select the region that aligns with your location to be redirected to the right support group.

In the situation that you haven't received any updates from the Support Team after your interaction with them for further assistance needed on our end, please provide the Pearson VUE Case ID number to the private message, for us to follow up with them on your behalf.
For future references please visit About online exams with Pearson VUE | Microsoft Learn and OnVUE Technical Requirements section to ensure a smooth testing exam experience.
Moreover, you can use the experiences that you have described to provide your personal feedback through Pearson Vue. This is a platform that allows you to submit your opinions and insights on various topics and issues.
You may refer to Feedback and complaints | Pearson qualifications.
Our goal is to ensure that we will be able to assist you properly, please let us know if additional information is needed.
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Message. Thank You.
Best Regards,