Citations are a bit tricky, since Google keeps YouTube’s financials secret, but from what I hear, it’s been in the red ever since the adpocalypse, and the new COPPA-rules will not help, since all content targeting children will now also be demonetised.
It does seem dated, but the author has continued to edit it since it was originally written. He's got stuff from 2018 and 2019 in there.
> massive loss-leaders like YouTube
Citation needed.