On Dec. 30, 1930, the first-ever photo of the Earth's curvature was taken by Lieutenant Colonel Albert William Stevens, who was an officer in the U.S. Army Air Corps and an aerial photographer.
This photo is one Williams took over South Dakota in 1936 during a record-breaking balloon flight, which also shows Earth's curvature.
(Image credit: National Geographic/Albert William Stevens 1930)
Just in the interest of cheering you up a bit, I'd like to point out that many people simply refuse to click on YouTube links. Personally, I have no desire to engage with video content, especially when it's shared with little to no context. It's not out of laziness, but more out of a conviction that far too many people have outsourced their thinking to random vloggers, and believe that posting a link to their favorite video essay lends credibility to their argument.
unfortunately that is definitely a trend. but then you also have the person who grabs one rhyme out of context and comments it aged like a milk, meaning they did open the video, listened to it and absolutely did not understood.
i am also not going to watch every 60 minutes long video someone posts me in a discussion, but if i am invested in the discussion so much i care about answering or voting on something, i at least try to understand the concept of the video and what it is trying to say.
the headline in this case did not help, but i rarely see such an example of crowd behaviour concentrated in such short time as was the case with this link.