Vessel CLI Demo (Shuffle, TL;DR version)

This is an MP4 of [this terminal cast](https://asciinema.org/a/626235), which in turn is a short version of [a longer terminal cast](https://asciinema.org/a/625867) with explanations. Both demonstrate the command line tool of [vessel](https://interpeer.io/projects/vessel/), our container file format for a human-centric internet.