What is the name of this component
The 'PLC' shown in that video appears to be a Puls ML30 powersupply.

Here is the datasheet.  And here is the Manual.

It is driving the command input to your pneumatic controller.  I believe they are just using it to simulate the 0 - 10 V control signal.  A proper PLC could be used here to provide the 0 - 10 V (or 4 mA - 20 mA).