The higher powered Spits had a reputation when it came to the torque they produced. The Mk XIV recommends the use of +7 boost for take off because of the strong tendency to swing to the right and to crab in the initial stages of the take off run. Tyre wear is severe if much power is used. The maximum of +12 boost may be used if carrying a heavy load.
It would seem from the video that he allowed the tail to get too high, elevator is neutral and the stick is not pulled back until after the prop hit the ground. Prop digging into the ground then forces the nose left, rather than to the right that torque would produce.
Spit pilots had a name for such prop strikes, "Pecking", and was not unusual.