We have had in the neighborhood of 200 + reported instances of the error -
"Could not get video."
The Biz Library tech support team finally determined the cause - the timing gap between the end user's pc/tablet and the server.
In talking to other server companies - we found that this is not an uncommon error but that it has driven some networks to support broader gaps - 15 minutes not being uncommon.
While the error would not be eliminated - broadening the gap from 2 minutes to 15 would reduce the error frequency.