A Mysterious Shipwreck in Maine: Pirate, Navy, or Merchant?

Picked one by one from a mixed channel. Transcript check: both title readers certain; 4 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only narrated, research-based explainer videos on historical warfare, weapons, armies and campaigns (e.g. round shot, gas attacks, bearskins, fougasses, national contributions to the American Revolution). Exclude reenactment and event footage, drills, parades, marches, film reviews, opinion or argument pieces, and anything with a dated event title.