This is awesome, thank you for sharing.
Is there any kind of genre or name associated with epic organ music?
A typical example is Carmina Burana, which qualifies as the 'most damn German thing ever' to me.
https://www.youtube.com/watch?v=GXFSK0ogeg4
It's not exclusively about the pipe organ but think people on Youtube refer to examples of it as 'Epic Music', often inspired by visuals from film or gaming. If you search 'epic music' there are a huge number of channels dedicated to it.
Here's a Japanese example:
https://www.youtube.com/watch?v=C7HL5wYqAbU
And the most famous example from my country:
There's a ton of music actually written for the organ which is quite interesting, in a variety of styles.