That same course is also available through Pluralsight. I teach courses through Frontend Masters, like my Advanced JS workshop (more courses coming soon!). I also have some JS training material available in on-demand video format. If you like this content and would like to contact me regarding conducting training on these, or other various JS/HTML5/node.js topics, please reach out to me through any of these channels listed here:
The content for these books derives heavily from a series of training materials I teach professionally (in both public and private-corporate workshop format), called "Advanced JS: The 'What You Need To Know' Parts". If you'd like to contribute financially towards the effort (or any of my other OSS work) aside from purchasing the books, I do have a patreon that I would always appreciate your generosity towards. If you like the content you find here, and want to support more content like it, please purchase the books once they are available for sale, through your normal book sources. These books are being released here as drafts, free to read, but are also being edited, produced, and published through O'Reilly.
Please feel free to contribute to the quality of this content by submitting PR's for improvements to code snippets, explanations, etc. The first edition of the series is now complete. This is a series of books diving deep into the core mechanisms of the JavaScript language.