Chrome extension for recording screencast video -- urgent

Develop a Chrome Extension that records your browser's tab or your entire screen and audio from your microphone and allows the user to download the video as a .webm file. This extension would be like a stripped down version of the Screencastify Lite extension. Please see the details in the attached document ... I have fixed budget of 2000$ and the fund will be release when the job will be [login to view URL] read the document and do not bid if you can not go with this budget. Thanks.