That's sage advice.
The problem is, there are so many really good and instructional You Tube videos out there, it's darn easy to get lulled in to falling for the click bait. In general, if a member already has a ton of posts, and their name and style is recognizable, those people are likely to be posting legitimate stuff. Some folks have 5000+ postings. If it's a member with only (pick your number) postings, then they probably need more scrutiny.
Maybe an internal forum rule ought to be that until you have X number of postings, you can't post anything with a link without it being reviewed by the Mods first? Just thinking out loud. After X plus a bunch more, then you can. It won't filter it ALL out, but I bet it will the majority of it.