Can someone explain what is happening in that video? I see some children, and an old guy ducking down below then, and someone setting up some piece of equipment I don't recognize. Call me naive, call me stupid, whatever: but seriously, please explain.
The kindhearted individual in the front at 0:08 drops a sizable mortar down a mortar tube and runs for the hills. The next :20 consist of the children and old guy waiting for the mortar to drop the length of the tube and the time delay fuse to expire. At 0:28 the mortar fires, apparently correctly, launching the mortar in the general direction of the kindhearted individual's target.
Of course, if the mortar fired incorrectly or exploded within the tube, that clearly visible collection of children would likely be within the shrapnel zone. Funny how the old guy appears to be keeping them there.
Also of course, if you want to destory the mortar, you're faced the with small problem that you have children gathered within the blast radius of your tank shell, opposing mortar, guided demolition unit (a.k.a air-dropped bomb), or the like.
So that would be what's happening in that video.
The set up and take-down time for that mortar system are also substantially longer than the recorded :30.