I've published a number of courses through Pluralsight, which can be found below:
Skype Web SDK: Getting Started
Beginner 1h 20m 23 Jul 2015
Skype Web SDK: Audio, Video and Conferencing
Intermediate 1h 15m 24 Dec 2015
This course provides an overview of how to add audio and video calls to a web site using the Skype Web SDK and includes code samples and cross-platform demonstrations.