In 2021, he wrote and directed the animated documentary Flee, that received three nominations for the Best Documentary Feature, Best International Film and Best Animated Feature at the 94th Academy Awards.

[4] He previously directed the short films Easa 2002: A Journey to Vis (2003), Something About Halfdan (2006), Closed Doors (2008), The Day After (2009) and House of Glass (2010), and the feature documentaries Searching for Bill (2012)[5] and What He Did (2015).

[6] The 2021 animated documentary film Flee tells the story of his friend Amin, an Afghan refugee in Denmark, and was one of the most highly acclaimed and award-winning films of 2021.

[7] Following Flee, Rasmussen signed with United Talent Agency and Anonymous Content to develop new projects.

[8] His first announced new project is based on the graphic novels of Danish writer Halfdan Pisket.