Manual Demonstration of the Venturi Effect

What happens here

To illustrate the Venturi effect, the presenter uses a yellow tube and a small piece of white tissue paper. He places the tissue paper on a wooden surface and blows air through the tube, first directly and then holding the tube slightly above the tissue. When he blows with the tube held slightly back, the tissue is lifted and floats, demonstrating the principle of reduced pressure in a faster-moving fluid (air) that lifts the object. He states this is a basic physics principle.

Goal: Observe the Venturi effect in action using simple tools.