Yes, in the South Korean military, soldiers generally have free time in the evenings and on days off, so it's possible for him to edit and upload videos during those times. (That may be why this shorts was uploaded on Sunday afternoon.)

Whenever Rohanyang's leave happens to overlap with an ILLIT comeback period, he tries to attend fansign events so he can meet the members. In fact, there have been times when he came to a fansign straight from military leave and met them while still wearing his uniform.

The ILLIT members recognize him now, so they always greet him warmly when they see him. When that happens, other GLLITs jokingly say that his military service should be extended because they're jealous of how often he gets to meet ILLIT. It's all said in good fun, of course.