no assisting is holding a snake by its head and putting the prey in its mouth in an effort to get it to eat. This is usually done with a small prey item.
What is happening in that video is forcing the snake to eat more than it is being offered, I.E. they offered some sort of fowl and before it is completely down and giving the snake the option to strike and eat another item willingly they are simply utilizing the already open mouth and inserting more food after more food after more food not giving the snake the option to stop.
