I watched the exact vid you posted before attempting to take it apart. O just barely was able to get the chain into the correct position(the chain didnt just fir there. I had to push a little) to push the pin out, but it wouldnt fit there when I was trying to get the pin back in.

Sorry about the double post. I just went to check again to make sure I'm not an idiot. I tried to get several links into the correct position, and they did not want to go there. Maybe I have a thicker type of chian???