It is an extraordinary claim... It's a discussion about breaking the laws of common physics. It's only one of the most rare phenomenon on the universe... Something that we theorize as to the possibilities. I have seen people throw that same link up every where, but nobody seems to actually understand it enough to know what they are talking about.
It's rather concerning that so many people accept something as esoteric as gravitational lensing without having the faintest clue as to how to calculate such a thing. Just because it sounds like a cool concept to explain a phenomenon doesn't mean that it's 100% factual or even possible to observe in real life. The videos floating around are simulation, nothing more.