... between the docu you just copied into the extension's docu page and the docu that was already on that page and still is? @Timeshifter:
Topic on Extension talk:YouTube
What is the difference ...
It has some additional info not talked about in the previous doc page. Plus it explains some things better or more in depth. Can't hurt to leave it.
I am not sure why you did not just add the missing information to the existing one. To me this page looks like a confusing concatenation of duplicate information. I am not able to determine the difference. :( I am utterly sure this can be done better and yes, I know that this is an bigger effort.
I put it in a show/hide box so it is not such a distraction. That way people can incorporate various parts into the main text of the doc page.