Looks like the magnet is falling thru oil or in slow motion. It is actually producing electricity and slowing the magnet down. I use a 3/4" x 1" n52 magnet. Makes a easy science project.
Here is a link to magnets on ebay:
https://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114
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