Customizing Available Download Resource

If it happens to have edge cases like what's being discussed in https://github.com/yoonwaiyan/stackskills-dl/issues/39, you could modify the source code to detect the correct download resource. Hacking out the source code is as simple as changing how a PDF file detecter find PDF files in your lectures:

# lib/course_finder.rb line 147

pdf = lecture_page.link_with(href: /filepicker/)