The 5-speed transaxle has a gear driven speed sensor at the differential. It may set a fault code if it fails. Does the odometer count up miles too or no?
The cluster self test is explained in the video. It will tell you if the cluster electronics have the ability to drive the speedometer pointer up and down the scale or not.
Fault codes may be displayed in the odometer window. Have a pen and paper handy and write them down.
If the speedometer still doesn't react with the self test, then you may have a failed cluster. Does 'thumping the dash top bring it back into operation at all? Does everything else electrically work?
1) Put the key in the ignition.
2) Hold down the trip odometer reset button.
3) While holding the trip button, turn the key to ON, and within 5 seconds the test should begin, and it will stop automatically when all the checks have completed.