A:Answer The same thing happened to me.
Try this - if you have a PC, right click on the Vidbox icon.
Click on Properties
Choose the "Compatibility" tab
Look for the "Settings" section, and click on the drop down menu (it may currently say 16-bit (65536) color)
Choose a lower setting (might say 8-bit)
This worked like a charm and I can watch the video as it records in the preview window on Vidbox.
If you have a Mac, you're still trying to change the same setting. I'm sure there's a similar way to adjust it.