sounds like a load of pseudoscience...
already the claim ' water has memory' makes my bullshit-alarmbells go off. haven't watched the video yet(think I'm going to get stoned first, since I suspect it will be a pretty big load of bullshit, and I sometimes like to watch stuff like that pretty stoned so I can laugh about it, pseudoscience may be dangerous, but it's also very funny), but the description seems to confirm my suspicions, with claims that thoughts or emotions can influence water. don't even need to google that to know it's bullshit without scientific evidence.
googling the guy, I get this wikipedia page:
Kr÷plin studied Civil Engineering at the Technical University of Braunschweig in 1977 and received a PhD for a thesis on the elastoplastic stability of steel bridges.
so not chemistry or biology, so he may have a dr. title, but it doesn't seem very relevant to his claims/'research' about water.
the water-thing is also listed there under 'non-academic work'
and here a link with some criticism of the idea of water memory(can't quickly find articles specifically about dr. kr÷plin, but googling on 'water memory' there are a lot of sciency blogs making fun of the idea, mostly in relation to homeopathy, which is ofcourse an easy target to make fun of seeing as how much bullshit it is) https://rationalwiki.org/wiki/Water_memory