Congratulations for using the wonderful #livechatplugin by @John_Livingston ! By the way:

If you have an account on a PT instance with (a recent version of) the livestream chat plugin installed, you can join from there: just copy/paste the live url in the search bar of your instance

The key was adopting #XMPP protocol for the chat; the @prosodyim server embedded into the plugin federates with other instances like Peertube ones.

You can join the chat with your XMPP client of choice as well! (And you identity is not revealed to other participants, being the chat semi-anonymous)