The Sparrow in the Chimney

The Sparrow in the Chimney is a Swiss drama film, directed by Ramon Zürcher. The film, starring Maren Eggert, Britta Hammelstein, Andreas Döhler, Luise Heyer and Milian Zerzawy, is the third part of a trilogy about family life, after The Strange Kitten and The Girl and the Spider, which the director created together with his twin brother Silvan Zürcher. The film follows two adult siblings who come together with their respective families in their parents' house in Switzerland to celebrate a birthday.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.