This is mostly a question for @owen as I’ve heard you did this before:
What is a quick-to-integrate live chat that we could add below a YouTube Livestream video when embedding it on our website? Meant for the upcoming Sci-Fi Economics Lab streaming. This could be a hosted solution or an open source tool to install on our server. In both cases, it should be embeddable to a webpage using an iframe or by including some JavaScript.
Background
The YouTube documentation mentions that embedding the live chat is also possible, but that seems wrong – they disabled the feature and did not update the documentation. (Details, as much as I could find them.)
I looked through several hosted solutions already, but none of them are really suitable. CBox comes quite close but has this confusing error message when entering the name and pressing “Enter” instead of clicking into the edit box with the mouse …