I like that he acknowledges that he's wrong (and that he knows nothing about Heuer - which, if that's the case, why go on record with a view that Carreras are going to plummet in value? - sorry, I digress), but I don't like that he flipped from saying in the video that value will plummet, to now saying "can they eventually sell for $30K, $40K, or even $50K? Yes, but they're not a value proposition." That's an entirely different argument that in no way corroborates or challenges the statements he made in the video.
Like I said, I give him credit for publicly acknowledging that he was talking out of his ass. The issue, however, is that you shouldn't talk out of your ass in the first place if you're a "dealer." If you lack the requisite knowledge base, just steer clear and head for other areas that you actually understand.