The doc for river that I found seems to be for elgg 3

Please show what you mean

If you mean http://learn.elgg.org/en/stable/guides/river.html that is up-to-date for Elgg 5.0

This is what I was looking at;
http://learn.elgg.org/en/stable/guides/river.html

However, I see this;
"As of Elgg 3.0 the view parameter is no longer required. A fallback logic has been created to check a series of views for you:"

Maybe that's what made me wonder if this was only for an older version. If I have the right url to add river, does anyone know of a video or article showing us non developers how to add this to our site? I'd love to have a 'feed' like look.

BTW, thank you for your reply. I'll take a closer look at that now.