A worm's-eye view is a view of an object from below, as though the observer were a worm; the opposite of a bird's-eye view. It can be used to look up to something to make an object look tall, strong, and mighty while the viewer feels child-like or powerless. A worm's eye view commonly uses three-point perspective, with one vanishing point on top, one on the left, and one on the right.
It is a very common technique in paintings. The term a worm's-eye view is a controversial term in real photography or videography circles, as some argue it cannot technically exist because worm's don't have eyes. More often than not, this technique is considered a modification of a low angle shot.