My last example is scrolling the texture within the sprite, which is a bit harder to explain, for example imagine you have a conveyor belt, instead of animating the conveyor belt moving, you can scroll a seamless texture to make it look like the conveyor belt is moving. The example below shows a texture that has been scrolled horizontally 30% to the right.
FEEDBACK: This was a bit fiddly, especially with relative mode, so I would suggest using absolute mode in this case. You will note I had to increase the number of mesh points and collapse the middle points together to the same position. This would be much simpler if it implemented UV wrapping - I'm not sure of the OpenGL terminology - but that's what I would call it. Then I could more simply use a 2x2 mesh, and set column/row (0,0) to texture (0.3,0), (0,1) to (0.3,1), (1,0) to (1.3,0), and (1,1) to (1.3,1).