You will need a USB host device in order to connect the MIDJet and the OP-1. The way you are connecting it in the video, the MIDIJet and the OP-1 are both expecting someone to take control and route data. It is not this simple. I would suggest maybe looking at a Raspberry Pi with the two USB devices connected and running the commands to route the MIDI data between the two. This would be cheap ($35) and small (about the same size as the MIDIJet). Otherwise, you will need a more expensive USB host (iConnect4MIDI+ or Kenton USB Host).
Thanks GCF. I don’t think the Kenton or iConnect4midi will work without being plugged in so it wouldn’t be wireless. I am doing Rasberry Pi research as you suggested. There seem to be ways of outfitting Rasp Pi with battery packs.
u can do the same w/ the kenton and i believe ICM too w/ a USB smartphone type battery & a usb to dc jack cable.
You can battery up the Kenton with one of those phone chargers - but make sure it has enough elbow room regarding amps - the amperage will drop a little as the battery runs out.
A great alternative is midipal from our friend at mutable instruments. It’s battery powered and has a ton of really useful features, besides being a midi host.