Still having trouble? I did a complete slower redo here: https://youtu.be/_xZzu2QhgPo
Redo of the final closing of the Seamless Cube. For the original tutorial, click here: http://youtu.be/i5QtqYWS5-I
If you still can't make it, I would recommend trying to fold my version of the origami waterbomb, the Spinning Lantern: http://youtu.be/i5QtqYWS5-I and shape the sides to make it a cube.