There are a number of collaborative environments now available. However, the quality, particularly of the video connection, will be dependent on a number of factors. Basically, you get what you pay for. Elluminate has one of the best video qualities I have seen. But it comes at a price. However, if you are working for a company looking to support people, including dyslexic individuals, this could be a good solution. It also provides a viable solution to remote tuition for dyslexic students.