It might be that you just can't find exactly what you are looking for in terms of content or delivery. Here is where you come in! If you want to take the leap and start making your own videos, there are some great bits of software/kit out there to help. I decided to copy Salman Khan after researching what he used to make his videos. Below is a list of kit you could buy that would allow you to screen record, edit videos and add annotations easily. Also, you will want to host your videos for which I recommend either screencast.com or Udemy.