Thanks Paul! Happy to hear you're getting some use out of the videos
Unlike most modern MIDI devices, the FCB1010 has DIN MIDI out but not USB MIDI out.
If your audio interface has a MIDI-in socket you can connect it this way. Or yes, you could use a MIDI to USB cable, that also works.
But shop around. There are an increasing number of MIDI foot controllers on the market now and most modern ones will have MIDI USB.
Hope that helps!