First of all, use the recorder, set the jammer over to the first gate - thanks to which you can carry the jammer past the gate, while being recorded.
Use the jammer to carry over the connector onto the pressure plate past the third gate. Place the jammer onto the pressure plate in the second room and direct the beam towards the first barrier.
In the next recording, take the jammer and place it onto the third barrier. Thanks to this, while playing the footage, you will be able to collect your jammer and open the last gate. There, you will find another jammer.
Now, return, using the jammers, and set the connector on the source and on the path. Two jammers directed towards gates I and II and the third one towards the third gate.
Turn the recorder on. While recording, carry over the connector, and then the jammer and set it in the way that allows you to open two gates. Carry over the connector and place it onto the path, where it has a connection with the button. Wait for a moment and return to the recorder.
While playing the recording, stand on the first connector next to the source, as soon as the recording copy sets its connector - to be able to couple them. As soon as you do that, run through the corridor - the button activated the fan, thanks to which you can reach the lever.