Fashion-VDM is a video diffusion model (VDM) designed to generate virtual try-on videos. This model accepts an image of a garment and a video of a person as input, aiming to produce high-quality videos showcasing the person wearing the specified clothing while preserving their identity and movements. Compared to traditional image-based virtual try-on, Fashion-VDM excels in garment detail and temporal consistency. The main advantages of this technology include: a diffusion architecture, classifier-free guidance enhancing control, progressive temporal training strategies for generating 64-frame 512px videos in one pass, and the effectiveness of joint image-video training. Fashion-VDM sets a new industry standard in the realm of video virtual try-on.