Andrew Kramer's Video Copilot has been the most influential free After Effects tutorial resource since 2006. Kramer built his reputation by making complex techniques accessible — his tutorials are project-based, clearly explained, and have introduced generations of motion designers to After Effects.
The tutorial library covers everything from fundamentals to advanced compositing, visual effects, and 3D integration. Unlike many tutorial sites, Video Copilot focuses on understanding the logic behind techniques rather than just reproducing effects — making the knowledge transferable.
Particularly recommended: the basic training series for beginners, and the motion design and visual effects tutorials for intermediate students. Many techniques taught here remain industry-standard today.