As per my knowledge, People can grasp Video instead of Audio OR any lecture discussion. Yes, Video is better way to understand people whatever they want like education, study, management trainings, management tutorials etc. I know many universities which are teaching to student through out video including fundamental knowledge.

Business persons are also use video to teach their clients what the products are and why their products are better then others. In Internet Business, business man preferred video conferencing for better communications.

Just try Videos for online courses and share with me your experience. You can place your comment on my Blogs if you have.