Rock Crystal (2004)

The towns of Gschaid and Millsdorf are in a constant state of feuding with each other. Nevertheless Gschaid's Sebastian and Millsdorf's Susanne are married. In her husband's town Susanne has to put up with daily harassment by the locals, which also extends to her two children. Finally she moves back to her parents, alone. When the children, who long to find a magical crystal they believe has the power to reunite the family, get lost in a howling blizzard on the exposed mountain after bringing their mother her Christmas presents, both towns set up rescue missions.

Unfortunately the movie Rock Crystal is not yet available on HBO Max.