Not exactly secure...
Watching that video, it took me about 2 minutes to come up with the idea of monitoring the output from the motor controllers on your receiving end via an ADC, recording the result to an instruction file, and simply playing it back through a DAC, bypassing the original control circuitry.
Plus... it's a bit of a bad idea for sending people objects that are either mass produced (Just send the bloody thing to begin with) or things that are unique (I know! Let's destroy the original, and make an inferior copy out of plastic!)
Still, it's an interesting experiment, and may yet yield something practical from the playtimes of demented students.