Where are the Old Ones in 40k

This is a great video I saw a several weeks ago, but was reminded earlier today by a reader just how much I love Warhammer 40k Backstory, especially regarding the Old Ones.

One Mind Syndicate often jumps into the lore and background of Warhammer 40k, and along with the Warhammer40kWiki, one of those places I personally read, and watch.

video by One Mind Syndicate
https://www.youtube.com/watch?time_continue=336&v=MVcBToQh5wg