While not as dramatic as "cross-circuiting to A" in the video, The NASA JPL news item Curiosity Rover to Temporarily Switch 'Brains' indicates that Curiousity has been switched back to "brain A" due to some issues related to storing data for later relay to Earth.
Since the initial launch of the Mars Science Laboratory, how many times has Curiosity switched between its two redundant computers?
Engineers at NASA's Jet Propulsion Laboratory in Pasadena, California, this week commanded the agency's Curiosity rover to switch to its second computer. The switch will enable engineers to do a detailed diagnosis of a technical issue that has prevented the rover's active computer from storing science and some key engineering data since Sept. 15.
Like many NASA spacecraft, Curiosity was designed with two, redundant computers -- in this case, referred to as a Side-A and a Side-B computer -- so that it can continue operations if one experiences a glitch. After reviewing several options, JPL engineers recommended that the rover switch from Side B to Side A, the computer the rover used initially after landing.