Awesome concept. I tried few online yoga training and here is my take. Keeping someone interested over a period of time would be real challenge for you, it gets boring way to quickly or goes down in the list of conflicting priorities.
MYT is one of best one to one delivering personalised Yoga and wellness classes I have ever seen. The teachers are rich in their yogic knowledge, absolutely convenient for people to be at home and take up their class and get healthier by body, mind and soul.
My Yoga Teacher is an amazing concept where one enjoys the luxury of having a personalized yoga session tailored to suit one's needs and that too in the comfort of one's home. One has to try this to experience the comfort.