I've now set a price for all of my video lessons (at the bottom of this page).
My aim for the video course was to go step by step through my techniques for every type of question. I think I've achieved this for writing, reading and speaking. I'm going to make just one lesson for the listening test, and then a couple of lessons for general writing task 1, but these will be free.
The videos were difficult to make, and took me longer than I expected. But I'm happy with the result, and the feedback from students has been really good :)