The blur we never thought to ask about You have almost certainly watched a video that felt wrong before you could explain why. Maybe it was dashcam footage shared on social media — the traffic moving just a beat too briskly, the pedestrians crossing the street with a faint mechanical urgency, as though everyone had somewhere slightly too important to be. Or maybe it was the reverse: a sports clip slowed down to a crawl, the ball hanging in the air like something painted on silk, the crowd frozen mid-roar. Your brain registered something about time before your conscious mind caught up. That gut feeling — this is moving at the wrong speed — is something humans do effortlessly and machines have, until very recently, struggled to do at all. A new paper from researchers at the University of Washington and Google changes that.…