Confirmed as fake. CNN reports: "YouTube on Monday removed three channels belonging to Luigi Mangione, the suspect in the killing of UnitedHealthcare CEO Brian Thompson, as well as a channel that was altered Monday to look as if it belonged to him..."

"... channel was removed for violating YouTube’s impersonation policies, after the channel name and handle were updated on Monday following news of Mangione’s arrest to appear as if it belonged to the suspect. That channel on Monday posted a cryptic countdown video that said, “If you see this, I’m already under arrest.”