I just watched the video on U TUBE - "How to attach a continuous binding." That is pretty much how I do it, but she didn't have the magic triangle pressed in, so she was just sewing "by eye" across that last seam. I also find it easier to lay out those last two tails wrong side up, and pick them right sides together; then just twist them the correct way.
When I'm showing people how to do this, I usually put my hands down on the table over the ends, fingers pointing toward each other, pick up my hands and "say my prayers" then twist my hands at the fingertips until they are at right angles. Then I can twist them the other way to show how to find the correct way that will put that pressed triangle in the right place. I guess you have to have a good imagination to figure this out. Have fun. Mavis