Aloha Iam2
Why not do the opening, one exercise for about 5 minutes, and the ending? Breathing of the Universe is always a good one to start with. Just have them relax and notice...
The video exercises run 25 minutes. When they get to that point and can do all of them, they'll close their eyes and follow when ready.
Don't be too bummed out when you introduce them to the sitting meditations and they breeze through it in the full lotus without a problem. 
Much Love and morning sun energy to you my friend,
Shawn
