Dimonds touched lightly on the subject on a very old You Tube video on their channel that they changed their position after looking at the data and being convinced of the Sedevacantist position. Of course they didn't directly admit they were wrong (they never do from what I've seen.)
By "touched lightly in a video" you meant it was the topic of the video?
https://youtu.be/pMN0N84Ajzg?feature=sharedThe video also calls out people like you who can't refute the Brothers so you try to somehow smear them and calls this statement a lie:
Yeah, it's pretty well known that before their huge rise on the internet that they were anti-sedevacantist and even kicked out R.I. when he was at MHFM for holding the position before they eventually did.
If you trust a disgusting liar like R. I. who said he'd torture St. Thomas Aquinas and calls himself a prophet you're clearly insane. https://schismatic-home-aloner.com/mp3/4_RI_demonic_source_of_schismatic_views.mp3
This type of "argument" only works on people who are infested with human respect, as Bro. Peter says: "We don't like to talk about ourselves much, because, frankly, we're not relevant. What's relevant is what we put out, what we produce, the teaching of the Church."