Well, you now how it is....everbody has to have a hobby and this is, I suppose,
marginally more interesting than say, stamp collecting or train spotting...
On the other hand, you have to ask who and
why ?
That said, congratulations to the filming by the "less than erudite" individual for (a) expanding his vocabulary with the addition of the word efflux and (b) providing a nice flight safety example of why nobody with brain cell stands behind an engine when it's running...
As for the kit, well I can think of a few organisations ( now defunct, thankfully) who would have regarded this a being cutting edge in their maintenance procedures..