With regards to your post - you appear to be wow'ed by the speed in which a normal 15 degree nozzle was cleaning what in effect is a very mildly dirty surface - as the video is sped up know one can tell haw 'fast' it actually was - I suspect it was quite slow
Yes in all seriousness you could clean that with a stiff broom and garden hose - it's not a seriously dirty surface - to you with your lack of experience might be impressed and so would any number of joe public but on here we have - shall I say a more critical eye
Your interest in the nozzle was answered and even a link provided - sorry if that offended you
Darran