This is a very short clip featuring Alexander Skarsgard in the movie D-dag (2000). Alexander appeared, very shortly, in the segment directed by Lars von Trier, who cast his staple actor Stellan Skarsgard for the main role. If you want to watch the entire movie, it's an interesting experiment in cinema, but, if you just want to catch a glimpse of Alexander Skarsgard, you don't need to go beyond this video, as this is all you get to see of him in the movie.
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From @mysticfalls