Lynda.com uses Flash for their courses. I'm not sure HTML 5 could do what they use Flash for. It is very complex the way they have integrated the movie, the lesson files, the text, your progress, etc. They should have the resources though to convert it, especially since Linkedin bought them. They do have an iPad version but for the desktop they still use Flash for some reason. I've converted all my Flash to HTML 5, surprisingly using Flash CC to do it.