The stated goal is not to show the standard figures but to move particles on a surface with precision using vibration — effectively asking whether a plate can be used as an actuator. That reframing produces a more interesting video than another sand demonstration, because it forces attention onto the drive electronics and onto what determines where a node sits.
Mehdi Sadaghdar's usual register applies: fast, self-deprecating, heavy on the electrical failures. Underneath it there is a real account of building the drive chain and of why controlling individual particles is far harder than producing a pretty figure — the pattern is a property of the whole plate, so you cannot address one region without changing everything else.
Thirteen minutes. Good for anyone whose ambitions for a plate have drifted from display towards manipulation.