Bike Trailer Jogging Stroller

I just bought a bike trailer and I can not get my bike to stay in place while putting the children in it. I thought that maybe the front wheel was supposed to be on and helped with the support of perfection, but after watching what is supposed to be used for jogging stroller. How do I balance my bike when setting young people in the trailer?

Have you tried simply lay the bike on the left side, it would be better then amazing.