jiffy Creates Animated GIFs on the Fly

There are roughly twelve million different tools for creating animated GIFs from video, but jiffy makes the process dead simple. Once you install the extension, you'll be able to enter the start and end times of a video directly on YouTube. Click "Make GIF" and the extension will automatically cut up the video and give you a link to an animated GIF. The quality is a little low, but it's hard to beat the speed.