Just click it to add the video to start the download process. When you play the video, you will see a Download button on the top left corner of the video, very similar to the following illustration. Begins Vimeo Download on Safari Firstly, you need to launch Safari, and visit Vimeo to find your favorite videos.After the launch of the WebM Video Converter for Mac, import your original WebM videos into the Mac application: directly drag & drop them to the app or click 'Add Files'. Download the Mac Video Converter and add your WebM videos.