How can someone watch this and with a straight face say this is “perspective” or “vanishing point”?

How can someone watch this and with a straight face say this is “perspective” or “vanishing point”?

“https://reddit.com/r/FlatEarthIsReal/comments/185m425/how_can_someone_watch_this_and_with_a_straight/”>View Reddit by Far_Gap7333 – View Source