Adobe provides its own video tutorials for InDesign, available to all, for both beginner and experienced users. They are current for Adobe Creative Cloud.
The InDesign Skills site offers text tutorials with screenshots on publishing with InDesign. It is helpful for those who prefer print over videos. It pops up ads for an eBook
Adobe InDesign Made Easy is a free, structured 11-hour course-like introduction to InDesign. It requires enrollment, but provides a certificate of completion. It is designed for version CS5.5 but the core