Why can't the streaming video be casted from iPhone?

vCastSender for iOS uses screenshot mode to capture casting content and works well with most apps.  However, vCastSender cannot capture encrypted contents in third-party apps such as Amazon Prime, Netflix and YouTube, due to copyright restrictions

Why are black bars on both sides while casting from iPad?

The ViewBoard has an aspect ratio of 16:9, while the iPad's aspect ratio is different. As a result, when the iPad is displayed proportionally on the ViewBoard, black bars appear on both sides.

Why do I get a black screen when using Vcast and Youtube/Amazon prime/Netflix?

Refer to this FAQ. 

Why is full-screen casting unavailable for iPad?

ViewBoard has an aspect ratio of 16:9, but the iPad's aspect ratio is different. Therefore, when the iPad is displayed in proportion to the ViewBoard, black frames will appear on both sides.

How to use "Mirroring"?

1. Connect your phone to the same network as the ViewBoard. 2. Open the control center. 3. Click “AirPlay” and select the ViewBoard device name for wireless display.