When you have a spark plug with value 5000 to 6000 ohms this value is good. Values below 4000 ohms can cause stress on the coil pack warming it up more than the usual. Any spark plug values over 6000 ohms is far outside the limits to give adequate spark for good air-fuel burn. In the video you can notice that the middle spark plug is well above 12000 ohms. The higher the resistance the lesser the spark creating a slower burn of the air fuel mixture. This delays the power stroke causing the engine to struggle before it picks up, thus creating a vibrate.