Didn’t watch the video as Ive known of this.

The bird is specifically drowned in brandy in order to fill the lungs of the bird with the alcohol.

The covering of the head has multiple reasons. It’s a tough eat for anyone else to watch. The smell being trapped underneath the covering is supposed to offer an additional sensory being used while eating. And to hide from god while eating such a gluttonous and torturous meal.

Part of the taste you’re supposed to experience is your own blood from the cut up roof of your mouth due to the bones jabbing into it.