The main problem here is that with the rule changes that happened last year, this channel will eventually be reviewed against the new content guidelines. When this happens he is certain to be removed from the Partner Programme and demonetized, making that video the only monetized unit on his channel, and him getting absolutely nothing from it.
If he is one of the larger channels which was depending on YouTube as either main income or income supplement, it is likely at that point the owner will either abandon the channel in place, or delete it entirely. The attitude of creators these days for the most part, seems to be: "If I can't make money, then I will simply leave".
No one seems to truly want to entertain the viewers any more...sigh.