This story on Reddit and a rec-listed diary has received much attention, and while there have been the usual poo-poos and claims that it was faked, media outlets have taken the story seriously and reported it.
The voting machine is located in Perry County, PA. Mother Jones is reporting that the machine has been recalibrated and put back online.
MSNBC's Zachary Roth reported that a Pennsylvania electronic voting machine was taken out of service after the video went up, but Mathew Keeler, a spokesman for the Pennsylvania Department of State, says the machine is back online again—though he couldn't confirm whether that rejiggered terminal was the same machine featured in the video.
"There was a single complaint, so they recalibrated the machine, did a test run, and put it back online. We've had no complaints since then," Keeler says. While he couldn't say for certain that this was the machine that "centralpavoter" attempted to use, he added that "we believe they are probably connected."
Of course it would be difficult to confirm from a video if it is the exact same machine, but they do say there was a machine recalibrated and put back online.
It is very fortunate that 'centralpavoter' took the video and posted it, forcing them to take action. Otherwise something like this would go unnoticed. And just imagine the outrage that would have been generated by now if it was changing a Romney vote to Obama.