Dogs are generally quite conscious even during their sleep and they become active whenever something happens around them. However, the video tells a different story altogether, where the dog is sleeping like hell and no one can wake him up.
In the video, you will see how eager the elephant is to wake the dog up. It uses its trunk in order to blow some air on the body. It puts its nose on the leg and the body of the dog and even tries to pull the legs if the elephant with the help of its trunk. However, the dog manages to keep itself aloof from all the trial and it sleeps in peace. It is a contest between one and three and the dog wins the contest hands down.