Recall from the video the steps of how to measure blood pressure using a stethoscope and sphygmomanometer (blood pressure cuff). note that before measuring blood pressure in lab, the subject should be in a seated position with his or her sleeve rolled up to expose the arm. place the steps in the correct order from left to right.

There is no video but I found an image that has the steps to be put in the correct order. Attached is the image. 

In taking the blood pressure of the patient, it is best to put the patient on seated position with his or her arms at heart level. The cuff should be placed at least 2 fingerbreadths above the cubital fossa. In using the stethoscope, it is better to use the bell of the stethoscope rather than the diaphragm as we need to hear low pitched sounds. 

The first step after all the preliminary steps are done is to wrap the cuff around the arm just above the elbow. Then place the stethoscope over the brachial artery which is in the medial side of the cubital fossa. Next is to squeeze the bulb and inflate the cuff above the systolic pressure. Next is to slowly release the pressure valve. Record the number when the first Korotkoff sound appears (systolic blood pressure). Then record the number when the last Korotkoff sound disappears (diastolic blood pressure). Lastly, is to deflate the cuff.