OK, we have the cross. Now we need to get the top corners put in the correct location. We are not worried about the way the corners are sitting we will rotate them in the next step. We want to just get the corners so that the top green and red corner is over the bottom green and red corner and so on. But all four lined up.
You will either have two corners diagonal from each other or two corners next to each other that are where they need to be. So turn the top layer till you have two that align with the bottom corners. This is a little hard to spot but if everything was done correctly at least two corners will line up.If all four line up then do nothing.
If two corners align next to each other then hold those two corners in your left hand and do the move below one time and everything should be in place.
If two corners diagonal from each other line up then hold the cube so one correct corner is in the left front position and do the move below. Have another look at your cube you should have two corners next to each other that line up. Then reposition as stated above and do the move again.