Since the recording, some tool's download locations have changed. Use this list to locate the newest edition or find the new location of that tool.
The mongo application/shell has been deprecated and a slightly better version called mongosh replaces it.
mongosh is largely the same other than the command to run it now is mongosh rather than mongo of course.
You can download mongosh as part of the MongoDB Shell
download from their website.
Robomongo was acquired by Studio3T. It's official name was changed to Robo3T and just recently the download location was removed from the website. But you can still download the exact same file from the GitHub repository:
https://github.com/Studio3T/robomongo/releases
(Open source for the win). Find your platform's version there and download it.