Lotta's training videos

My friend thought that we would create a thread where we could put training videos. She thought that we could also ask questions about them.

My friend has seen tutorials about this trick: Shake your head no. We have this video about it:
http://vid740.photobucket.com/albums/xx50/CavalierLotta/shakeno_zps5e440bac.mp4

If my friend coaxes Lotta to go under something, she gets her to stay still. She doesn't have a crate and Lotta don't know how to stay. For example in this video the dog stays in the same position when she/he is doing this trick:
http://www.youtube.com/watch?v=77QwLyFTco0

So, my friend did get Lotta to do something (see the video). She has some questions about this:

Does it look good? Should my friend teach one side at the time? How should she continue?

We told that my friend has seen tutorials about this trick: Shake your head no. In many tutorials my friend has seen they teach a dog to touch something in both sides of him/her. She has read that that trick can also be teached by luring. We have this video about it:

My friend would still like to know what do you think about it. We also told that:
Or, should my friend first teach Lotta to stay and to touch some objects with her snout?

We have also another video: