Marion, there's no contradiction. "Sunrise" is just a common term to explain how it looks as the sun arises at the beginning of the day. If you think it's some sort of scientific term, you're sadly mistaken. Most people are not scientifically minded (nor do they need to be), so most terms originate from the common folk and their perspective.
Pax, I agree that rising of the sun and setting of the sun (or moon) are common terms used in all languages to describe general observations of all (including scientists). Now, flat earthers claim that these observations deceive. See e.g. the quote at the end of this post. Start the video at 11'45". The guy explains that the sun really moves at a constant height, while it only appears to rise or set.
Flat earthers claim that people were and are generally deceived, and were and are too retarded to realize the effects of "perspective". People have called the sunrise sunrise and the sunset sunset, ever since at least Moses. The Lord called it sunrise. Some decades after the NASA fooled the world with fake moon landings, the Lord gave grace to some, to the flat earthers, to see that humanity erred since at least Moses, who called the sun rising and setting, while in reality it isn't.
More precisly, humanity erred up to the Apostle Eric Dubay.
It's not before 2015, that the current FE sun and moon model was published.
Recent flat earthers claim that people generally are deceived and speak according to appearences and not according to reality. This, as presented, includes Scripture; Moses, Solomon, and the Lord.
An analog problem is known since Galileo Galilei, who thought that the earth orbits around the sun. St Robert wrote:
And if you tell me that Solomon spoke only according to the appearances, and that it seems to us that the sun goes around when actually it is the earth which moves [...]
Consequently, our flat earthers put themselves into an uncomfortable situation. They claim that Moses, Solomon, and the Lord speak "only according to the appearances". Their situation is that of the heliocentrists.
This is some of the best sun timelapse stuff I've seen.
Lots of great footage, but see in particular 9:29 - 10:34. If the sun is 93 million miles away, it should NOT increase in size like that. It absolutely looks like it's coming closer to the camera.
12:15 - 13:12 ... watch it get smaller and move in a straight line as if in a perspective line.
P.S.: The video is nonsense. E.g. the guy presents perspective as if the sun wouldn't change size with distance. I can't understand how Ladislaus falls for such cretinism.