Even though the United States is now considering proposals to arm Ukraine’s military, to counter aid to separatists from Russia, the war in the eastern provinces of Donetsk and Luhansk has nearly disappeared from American television screens.

But the war can be viewed, in all its horror and brutality, by anyone with an Internet connection, as one constant feature of events in Ukraine in the past year — since protests in the capital gave way to a bloody insurgency in the east — has been the relentless effort by Ukrainians to share evidence of what they are going through on social networks.

So, almost as soon as it was reported on Tuesday that at least seven civilians had been killed in a rocket attack on the government-controlled town of Kramatorsk, video clips recorded by residents were posted on YouTube and VK, the Russian answer to Facebook, giving a vivid sense of the terror during the bombardent.