[Plugin: TubePress] How to add a download link

Hi, I`m running a BMW site and there is a BMW video https://oscar-bmw.com.ua/category/video-bmw/ on my site, the video is generated bu plugin TubePress, it works fine, but i was wundering how to add a DOWNLOAD button near to every video, the idea is to make a DOWNLOAD button to download videos from youtube directly from site by one click. Tnanks.