In a bombed-out building in northwest Syria, rescue workers who for years have braved Russia's war strategies film a tutorial video for Ukrainian volunteers crammed with tips gained from first-hand experience of treating casualties.
Using a dummy, members of Syria's "White Helmets" civil defense force demonstrate how to apply bandages and tourniquets in a clip shot in the opposition-held town of Ariha in Idlib province where Russian airstrikes are relatively routine.
