Twitter Gif & Video Downloader

Vitaminiser

Allows you to easily download any original Twitter media (like images, videos and GIFs) embedded in a tweet with 1 click, without manual selection, copying and pasting URLs and opening other sites. - Mouse over images displays a button in the bottom right corner. Clicking it downloads an original sized image. - All videos and gifs have a mouse over 'Download' button in the top left corner. Clicking it shows different video resolutions if available. - Since Twitter converts all incoming GIFs to MP4 you can either download it as an MP4 or upload it to 3rd party sites to convert - this is handled by EzGif.com, Giphy, ImgFlip and Gifs.com (more sites coming).

Screenshots from Chrome Web Store