I tend to accept such theories, no matter how strange they are,
as theories.
However, if somebody tells that he found out something new and better, I tend to be careful with what is done and what is proven.
The proven levitation is simple these days, all you need is (natural) magnets and electro-magnets. Maglev has all that. (Powerful air stream is another way, but that's not on this subject.)
What these guy do is, however, not very clear to me.
No special preparations were made except the positioning. There were metal items on the levitators and around the room.
Maybe I've missed something, but those metal items may be the key. You know, with metal and electricity, if the positioning is right, you have just the same tech as maglev, nothing new, nothing spectacular.
Also it's not stated if that kettlering is made of metal or not, maybe it's something special. Maybe it's a magnet or magnetized material.
Human body and nature can also build electricity, but not enough for this.
So it's not clear - at least not to me - what they did and how.
so the object had apparently lost 33% of its weight.
(...)
Also the goal to achieve zero or negative gravity when the circumstances are correct seems achievable.
It may not work like that. You know, I count what remains. And if we repeat the process infinite times, it still remains more than 0.
It's a sequence: 1, 0.66, 0.66*0.66, 0.66*0.66*0.66, .... (sorry, En is not my main language and I am not great on explaining)
Further tests:
To efficiently measure the antigravity, the next experiment will include a scale.
I'd like in the future tests, for example, to also see them done somewhere they can't possibly have electricity / electromagnets.
I'd like them to prove that the kettleball doesn't contain any kind of magnets.
However, it's an interesting subject. I'd like to have something proven for real. It could help on lifting and transportation, maybe even make something cheaper than Maglev.
Now.. antigravity is a more hazardous subject and I don't think that they did that. And that's also harder to prove, I think.