Basically what I am doing (to collapse the cable)... is slide the plastic assembly back & forth on the cable (tip of cable held with one hand) until the plastic accordion section collapses.
Once the accordion section is collapsed, it needs to be held collapsed so that the cable can be connected.
2) From under the vehicle, grab the lever that the cable attaches to and pull down on the lever until the accordion section of the clutch cable "collapses". As shown in the first 8 seconds of the above video.
Let go of the lever (no need to disconnect the cable).
Collapsing & releasing the cable "repositions" the self adjusting mechanism... having done that, sit in the car and press the clutch pedal several time.