Setup Explanation | Send EEG triggers from OpenSesame

Hello everyone,
Can anyone please explain for me the setup in the video below? Here is the video:

And here is the original post about the video, but I couldn't find enough details about the description of the setup:
https://neurosciencemike.wordpress.com/2016/07/20/send-eeg-triggers-from-opensesame-by-parallel-port/comment-page-1/#comment-100

This is what I understand:
The setup is comprised of a PC and a laptop. The experiment builder is running on the PC. In the beginning of the video, the experiment is started on the PC and the fake stimuli (stimA, stimB, etc.) started to show up. Every stimulus writes an integer value to the parallel port.
Then:
As far as I understand, a parallel-port-to-usb converter is used; this is what is entered to the laptop through a usb cable of course, right? The usb cable is shown in the video as a black striped cable with a silver tip at the end of the laptop, right?
If all of the above is correct, does this mean that there is no “direct” cable or connection between the PC and the EEG unit? Are they just both connected to the laptop?
One last [silly] question: What is the software that was running on the laptop on which the sent triggers was shown?

Thank you in advance.