'Oumuamua: Why a Natural Origin Is Most Likely
PBS Space Time · Explainer · 18 min · 2018 · YouTube title: 'Oumuamua Is Not Aliens
Why it's here
HN recommends it as a sober analysis of 'Oumuamua theories that counters the alien-spacecraft claims.
What it covers
PBS Space Time examines the interstellar object 'Oumuamua and the popular theories about it, including the light-sail hypothesis. It argues that a natural rock is the likeliest explanation.