VideoDoodles is an interactive system that simplifies the creation of video doodles by allowing users to place flat canvases within a 3D scene and then track these canvases. This technology enables hand-drawn animations to maintain correct perspective distortion and occlusion effects while moving along with the camera and other objects in the scene. The system supports precise control of the canvas through a 2D spatial UI, allowing users to set positions and orientations with keyframes and automatically interpolate them to follow moving objects in the video.