"Video Connection Timed Out”

This issue is caused by: Delay latency on the user's computer, or slow internet connection speed.

To solve this issue, please follow the below steps:

1. Try clicking on the try again button on that same page. Noting that it's only necessary to click this button one time, clicking the button multiple times will not help.
2. If the error persists, exit LockDown Browser and restart the computer.
   • Shut down all other running applications on both the computer and the network, including other network devices.If using Wi-Fi, move as close to the router as possible.
   • Lunch LockDown Browser again.
3. If the error persists, try using a different network, or a hardwired connection via an Ethernet cable.

For more details, please read this article.