dvanaylsis documentation notes/update

[libbyhopfauf]

@arnicholson documentation is looking amazing! I just wanted to note that for dvanalysis, under the section for using the CLI, you can up the instructions for using dvplay! Here's the demo video. I will use the transcript to create the instructions and add in a description for how to navigate the HTML. This is my way of reminding myself to do that!

[arnicholson]

@libbyhopfauf Just checking in whether you have that demo video! I would wing it, but I haven't used dvplay in the CLI very much so your instructions would probably be more helpful and accurate