Update Cluster_Computing.md

mkdocs-project-dir/docs/Background/Cluster_Computing.md

@@ -14,6 +14,11 @@ In this context, a cluster is a collection of computers (often referred to as "n
 They're networked together with some shared storage and a scheduling system that lets people 
 run programs on them without having to enter commands "live".
 
+If you are doing the "ARC - Introduction to High Performance Computing at UCL Moodle course" the link to the video explanation of this is here: https://moodle.ucl.ac.uk/mod/page/view.php?id=4623810
+
+This video is also available here: https://mediacentral.ucl.ac.uk/Play/96444
+
+
 ## Why would I want to use one?
 
 Some researchers have programs that require a lot of compute power, like simulating weather patterns or the quantum behaviour of molecules.