Here's another man who uploads videos of the Aurora Australis. Notice the name of his video: "The Power of Interpolation"

The primary definition to interpolation is: "to alter or corrupt by inserting new or foreign matter."

But not an appropriate definition. Try the following one:

1.3 Mathematics Insert (an intermediate value or term) into a series by estimating or calculating it from surrounding known values.

What he corrupted was the video, the foreign matter he inserts is the Aurora Australis.

No, he altered the video, by inserting new matter in the form of transitional animation frames in order to create a smooth 4000 frame animation based on just 174 images of the aurora australis.

Direct quote of the video description:

Published on 4 Mar 2015Slowed down time-lapse of a delicate moon-lit auroral display from Smails Beach, Dunedin NZ on 1 March 2015. 174 consecutive two second images, interpolated to produce just under 4000 frames and an animation of 2.5 mins at 25 frames/sec. This comes close to replicating the real-time movement.