German educational film: soldiers build an igloo

This short instructional film depicts German soldiers, in uniform, in an unidentified mountainous region surveying a snowy hillside to determine a fitting location to build an igloo. EXT, VS, a group of approximately 8 soldiers at work with shovels and saws in the snow, cutting and moving uniform 'bricks' of snow to construct their shelter. They load the blocks of snow onto a sled to transport them more easily. The soldiers work diligently to perfect their igloo, making sure to even out rough spots, and keep the bricks uniform and level. The igloo begins to take shape, there are now shots from inside and from outside the igloo as they continue to build and construct the rounded roof. The soldiers put in an arched entry way. They pack more snow down on the roof, and begin to bring items inside the igloo. INT, two soldiers separate tree branches and twigs on the igloo floor. MS, three soldiers sleeping side by side in sleeping bags inside the igloo, the sunlight is streaming in from the sky light left in the roof, and a thermometer is hanging above their heads. One of the soldiers opens his eyes and reaches up to grab the thermometer, reading the temperature inside the structure. He seems content with the reading, and goes back to sleep.