First of all - this video is real!
These guys bought an inexpensive scrapyard electromagnet at a well known onlineshop.
They used this strong magnetic field to manipulate small balls which were equipped with controllable small electromagnets. The result is just absolutley amazing!
I do not want to know how much current the big magnet draws ...
I'm also worried that the strong field could damage your Iphone, smartphone, laptop, mobile phone and pacemaker! Just look at it!
This is a typical example of geeks having fun !