User blog comment:Drew1200/Is There Any Interest in Brickfilming?/@comment-5644737-20140219032525/@comment-1693968-20140219161908

Yes, a webcam is almost essential for stop motion. It's possible to assemble individual pictures from a normal camera, but that is tedious, long, and difficult. Using a webcam, you plug it into a computer, and use a program that automatically assembles all of the pictures into a video file the same second you take the picture.