白板马克笔讲解动画Whiteboard marker explainer

彩色马克笔在白板上画出图示与箭头，一只手持续入镜。适合流程讲解、产品对比、营销短片。

Colored markers sketch diagrams and arrows on a whiteboard, a hand staying in frame throughout. Built for process explainers and marketing walk-throughs.