Bodies lie in the pockmarked streets, smoke billows from the ruins of homes, fences sit flattened: A new video offers a rare view inside a front-line city that has taken on the brunt of the fighting as Russia presses on with its offensive in northern Ukraine.

Ukrainian authorities have reported that the town of Vovchansk, with a pre-war population of around 17,000, has been devastated since Moscow’s troops swept across the border and opened a new front in the Kharkiv region earlier this…