Why is there no audio output while casting by vCastSender from a Windows PC?

1. Ensure your PC's playback device is set to "Cast Audio" during casting and that neither device is muted. 2. Please ensure “Audio” is not muted on the PC. 3. Please ensure the ViewBoard is not muted.

Why can't I cast streaming video from a Windows device?

vCastSender for Windows uses a screenshot-based method to capture and cast screen content, which works well with most applications.  However, if the content from third-party applications is encrypted (e.g., video files, streaming content, digital rights-managed material), vCastSender cannot cast it due to copyright restrictions.

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

Refer to this FAQ.