Most of his videos are on crashes. He has said he won't speculate on active investigations, but has already done videos on what is known, and preliminary reports.
You're either misremembering or misunderstood something, or I'm not understanding what you mean, because Mentour Pilot literally has a channel with nothing but air crash investigation videos: https://youtube.com/@mentourpilot
He has one of the best air crash investigation journalists, Kyra Dempsey (aka Admiral Cloudberg) as one of the writers on the channel.
They already have a YouTube Short listing the facts of the crash, and also have a longer video about the Jeju one. Only the facts, no speculation - they're waiting for the preliminary or even final report to make a full in depth video on it.
