you can't debunk FE

Some useful info in the video, which shows that the two men were converted to the flat earth view by science, after initially trying to refute FE.

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How wrong can you be? Let's see: 
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The video is entirely a useless piece of garbage. All the "two men" (euphemism for what?) had to do is step outside and look at the moon. Apparently that's too much work.
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The path the moon makes across the sky and the path the sun makes across the sky tells us that the earth is a globe.
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To believe the earth is "flat" you have to ignore the facts you see in the transit of the earth and sun.
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It's right there in front of your face, if you dare to look.
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The stupidity of "flat-earthism" is debunked every day. You have to be really stupid to ignore it.
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Globalism is the epitome of pagan indoctrination.  It's all in a name.

It certainly is. It's interesting that the globe earth idea further developed and gained a strong foothold (as far as I know - correct me if I'm wrong) alongside the Reformation. The Reformation brought us so many ills, which comes of so many sects who interpret Scripture in any way they like. Now our society is reverting back to paganism, where the globe earth idea began in the first place.

There is a living geocentric scientist of the Protestant persuasion named Gerardus Bouw who said: "Historians readily acknowledge that the Copernican Revolution [i.e., the idea that 'the earth moves and turns'] spawned the bloody French and Bolshevic revolutions... set the stage for the ancient Greek dogma of evolution...led to Marxism and Communism...It is reported that Marx even acknowledged his indebtedness to Copernicus, without whom Marx believed that his ideas would not have gained much acceptance...It is thus a small step to total rejection of the Bible and the precepts of morality and law taught therein."
If true, and it appears from my studies he's not incorrect, then Heliocentrism is an evil with which we must contend because it has come full flower in our time.  Sadly Bouw is a round earth Geocentrist, but at least he recognized that by pulling a switcheroo on God's creation and indoctrinating everyone to believe something else is a very bad thing.
Besides that, science, scripture, the Church, the Saints and Popes who discussed creation describe and even insist that earth is flat, with four corners, a dome, pillars, and set in its own foundation.  The arguments Catholic notables endured with pagans are available for all to research, but most won't even consider it because they are afraid of the truth.
It is well known by at least the scientific community and more informed globalists that Copernicus re-introduced the heliocentric spherical earth in a way that enabled them to carry it on down through the ages in order to set the stage for the nєω ωσrℓ∂ σr∂єr and the anti-Christ.  Resistance to this truth is perpetuated by the ignorance of our leaders who either refuse to accept it, or are promoting it for nefarious reasons.  Heliocentrism is a very lucrative lie.  From tv series and movies to classrooms to government programs like NASA and their fake space walks, evolution, satellites, dinosaurs, global warming programs, the Big Bang, godless origins books, Heliocentrism sells.  There's an old saying, lies enslave.  If you bother to connect the dots, anyone can see that this particular globalist lie is a tool of Satan. After all, the word government literally means: mind control.      

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The fact that the earth is spherical is as plain as the nose on your face, that is, if you can think.
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Animals can't think, so they can't know what the shape of the earth is.
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If you want to behave like an animal, then be my guest.
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It's so obvious to a thinking man, there's nothing so certain as this.
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It's as certain as 2+2=4.
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But for you, that's demonic, eh?
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Is the Sun flat??

I’m sorry what??

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You've missed the discussion, apparently.
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If you can think, you can understand the earth is not "flat" but if you can't think, then, whatever.
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It was really funny to watch the flat-earthers dancing around the big problem of the total solar eclipse that occurred in August this year. If they had been honest, they would have gone on record saying that it was a big hoax, and that no eclipse was going to take place. But their reticence spoke volumes.
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They cannot predict eclipses because they don't believe that the moon can obstruct the sun at enormous distances in space as it in fact does. They cannot explain why the moon and sun don't smash into each other when they keep saying (without any empirical evidence) that the moon and sun are approximately the same distance from the earth -- they say "about 3,000 miles" but they never can say with precision just how far they are from earth.
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Flat-earthers say there is no way to calculate or measure the distance from earth to moon or earth to sun.
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Nonsense.
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But nonsense is their middle name. Most everything flat-earthers say is nonsense.
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