Posted by Sonny Dickson, the clip shows the case of the smartphone but this time in yellow color.
The case is compared to several older iPhone models, including a side-by-side parallel with the iPhone 5.
This week Dickson published photos of the volume buttons in shades of green, yellow, red, and blue.
The budget iPhone is expected to be available in a variety of colors at its launch.
Apple is expected to unveil the iPhone 5S and iPhone 5C on September 10.