These are the details I remember:
- It was about suddenly almost everyone disappears.
- The whole story is centered around this guy who is trying to find his family after everything happened.
- During the journey, he starts finding what happened and why people disappeared.
- Episodes on Youtube, about 3-4 minutes each.
- The format was kind of like a drawn comic-sketch based scenes, with little animations.
- It was narrated from the point of view of the protagonist.
OK, that's all I can remember. Thanks.