1993 Jeep Cherokee oil sending unit

No video but your oil sending unit is located on right side of engine block pictured below..

Remove the electrical connector that plugs into the end of the sending unit. It is a weather-tight connector and has a retaining clip on the slip that you will need to lift slightly while pulling the plug loose. Locate the nut-shaped metal base on the sending unit and grasp it with a large pair of slip-joint pliers. Turn the sending unit counter clockwise to remove it from the block. Do not grasp the sending unit on the plastic, it will break under the pressure of the pliers. Insert the new sending unit into the block and tighten it until snug. Do not over-tighten it or it may crack. Plug in the electrical plug on the end of the sending unit. It will click into place when it is fully seated. Test run the engine and verify that the sending unit is working by checking the gauge in the instrument panel.