I'm sorry 3dd, but this is not a matter of agreement or disagreement, the aluminum remains non-magnetic throughout the entire experiment, this is science fact.
What you are seeing is an alternating magnetic field inducing an electric current in the metal plate, all electric currents create magnetic fields and it happens to be the reverse of the applied field with non-magnetic materials, NO property of the material changes it's exhibiting the same ones, this is just a very clear case of it showing off the basic EM properties of non conductive metals which are otherwise not visible in static or slow moving magnetic fields.
Wants to see something that will really blow your mind?
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This is the exact same thing that's happening in the video you linked, you just don't understand the basic properties of the materials and how the interact with magnetic fields. It's your lack of understanding that make's you think the material is changing which is NOT the case. in the case of the magnet down the tube, those neo magnets are incredibly strong, multiple orders of magnitude stronger than the weak ones that levitated that plate, but they're fixed... There in comes the magic, the magnet is falling but the tube is not so all of a sudden it's a moving magnetic field (AC) and a REALLY good conductor (copper) The falling magnet induces a current in the pipe opposite that of the static magnet and this slows the fall of the magnet through the pipe.
Please feel free to research the eddy current effect, and strong moving magnetic field interaction in the presence of non-magnetic metals.
Experiments like this look more than what they are because you can't mentally link the two events together the only way to understand what's going on is to have a fundamental understanding of the physics involved, experimenting with projects will teach you nothing until you learn the physics involved.