Even when they accidentally speak the truth, it's with such BITTER ZEAL that the whole package is useless, and is better to throw the whole thing away. The Truth might be rare, but it's not hard to find outside their foul apostolate. There are countless books, websites, priests, bishops who speak the whole truth today. We don't need to dig in the sewer through human waste, hoping someone swallowed a coin here and there. We're not THAT desperate.
While I'm not a follower of the Dimond brothers, they were the reason I even began looking into Catholicism due to their Steven Anderson docuмentary (which I found shared on one of the cesspools of the internet).
In a vacuum, they have a lot of good material on apologetics, especially against the Eastern Schismatics. If not for their material, I would have continued looking into Eastern Orthodoxy and would have probably stumbled upon someone like Jay Dyer. There's a lot of young men being seduced by Eastern Orthodoxy (I've witnessed two Catholics fall victim to this), and it's not being addressed as comprehensively as it should by most Catholics (to be fair, the average Latin rite Catholic knows next to nothing about the Eastern churches). For all their faults, the Dimonds with their videos were able to pull me out of the anti-Catholic biases I was raised with, so I have an admittedly irrational soft spot for them.