★ Quick Tip: Bookmark ytstl.com so you always have a direct way back to the site.
How Levers Help Us Overview
Released in 1970, How Levers Help Us is available in 720p and 1080p with excellent compression. Blending Documentary elements, the film stands out in its category. The full 11 minutes runtime is tightly compressed without losing visual quality. This instructional film shows the three parts of a lever and demonstrates how various levers help to move things more easily, or move them farther and faster.
