Grass Valley, the video technology company, not the town, has consolidated its operations at its Nevada City campus into one building, according to the company’s spokeswoman. While the facility shuffling may seem minor on the surface, the development comes as Sierra Video, another Nevada City video technology company, had its manufacturing department consolidated with its parent company’s headquarters in Israel and on the heels of a series of management changes at Grass Valley, formerly known as the Grass Valley Group. “We are concerned,” said Nevada City Manager David Brennan. “What hurts us is we lose jobs. In losing jobs, that …