As HTML5 and responsive patterns mature the relevance of motion in user interface design increases as well. However, when an application uses motion to communicate, static screenshots may fail to demonstrate how an interface works to clients or team members.
To that end I’ve been using LICEcap, a simple and lightweight screen recorder that renders a GIF “video” on save. The program is cross platform, free, and made by a company with a trend toward inexplicable naming choices.
One more use: bug reports.