Sorry, your browser does not support either the latest HTML5 standard for video or the video format mp4. Firefox doesn't play mp4 videos. Or, download the most-compatible browser Google Chrome at http://www.google.com/chrome .
Perform (an action, the precise nature of which is often unspecified).
E.g. "something must be done about..." MUST #DO SOMETHING.
ASL digit written and contributed by the ASLwrite community, 2017.