beta
1. They can do more than 1 save. Maybe, there are some things that will be skipped on the 2nd save or it could be the save/videotape of something like DLC version.
2. Someone copied Yongtaek videotape customization design.
3. Yongtaek did both but he doesn't know. Probably, he lost his memory of already having one and someone told him to do the second tape, or he thought he didn't have one so he made the second tape.
So I've trying to find if author tweeted about this manga. I've been scrolling so hard and i can't find anything (._.) Maybe see you in 2 years or more...