Overview
Detour is a 2013 film directed by William Dickerson.
Plot
Jackson Alder awakes to find he has been buried alive inside his Jeep after being hit by a mudslide. He tries to open his window to see how high the mudslide is, but soil starts pouring into his car, so he quickly rolls up the window.
Soon after, his sunroof starts caving in, but he manages to stop it from collapsing by using tape and a tire lock. He drinks his remaining water and regrets it instantly as it was all the water he had left. He draws a cross on the back of a seat and starts praying.
Later, when water starts dripping through the cracks of the sunroof, Jackson makes a funnel out of one of his credit cards and props the empty water bottle below where the water is dripping from. He takes apart a camping chair and attempts to slide the pole through a small hole in the sunroof, but it doesn't work, so he scrunches up a newspaper to cover the hole.
From Wikipedia (CC BY-SA 4.0).