@streetsesh80 If there are two lenses, ignore one of them, and draw the diagram for the other lens. Then, use the image from this first lens drawing as the object for the second lens drawing. And...that's it.
@legotransformersonic : This might sound lame, but just pretend the lens is bigger, as in taller than it's shown on your sheet, and use the same method as in the video. In real life, you might not be able to see the entire image at once, but the part you could see would match the drawing.
@streetsesh80 If there are two lenses, ignore one of them, and draw the diagram for the other lens. Then, use the image from this first lens drawing as the object for the second lens drawing. And...that's it.