For the subjects, (robots, weapons) it's a bit normal, they are creators of objects for video games!
The 2nd one is a bit more "down to earth" and utilitarian if you will! The space conquest!

But I agree it should be more poetry and formal research! :)

For the first one it's part of the videos that the author committed himself following his "Patreon"!
Documentary videos on current modelers!

For detailed videos of Arimus just go to his Youtube site where you will find many Tutorials (hundreds) ultra detailed and educational
on several programs including Moi3D (44 videos), as well as generic videos on modeling in general!

We can thank him for his effort, because he doesn't have only that to do! :)



For the 2nd one, it's just a (free) chapter taken in the middle of a paid MOI3D training! ;)