Sentence:  Using <WSD>MMD</WSD>, PC users can easily program how a 3-D model moves its hands, arms, legs, lips, and so on. To make a music video, users simply add a song and sync the model's movements to the beat and lyrics. Although <WSD>MMD</WSD> lacks versatility compared to expensive commercial tools, it has the essential advantage that the 3-D model immediately moves according to whatever movements you specify, making it very easy to use. 
Meaning of the word marked with <WSD> tags:  (w:MikuMikuDance) A freeware animation tool for creating dancing cartoons.