Unable to update site when attempting upload of new video file.

Following error messages displayed:

Percentage upload bar goes beyond 100% (normally about 114%) then Error message 'Timeout Was reached'

I have version 9.2.5.30583.

Another large site (about 2GB) always attempts a full upload despite the 'Fast Publish Only' box being ticked. I don't know whether these are related but they are bad!

I have Win 8.1 64