This is a great documentary of the Royal Marines Speed Marching Team’s attempt in 2017 to break the 26.2-mile speed marching record.
It is a great look at their history with the event, the motivation driving them, and the pain endured.
I’ll warn you in advance that watching it to the end will make you want to grab your ruck and your buddies to go conquer the world. It is pretty epic.
Enjoy.