|“||Memento Mori, Unus Annus.||”|
―Unus Annus, meaning "Remember death, One year."
Unus Annus is a YouTube channel created by Markiplier and CrankGameplays. This channel is planned to be deleted after exactly a year since they uploaded their first video, with none of its content re-uploaded on their own channels, and all of its merch will no longer be available. Hence, they suggest viewers create memories in their unique experiences.
Three days after its initial launch, Markiplier and CrankGameplays uploaded a video on the same day with the same title, "This Will End in One Year". Both videos have them explaining their new channel in a monotonous voice and a formal look. To promote their channel, Markiplier changed his profile picture to a blank white, while CrankGameplays changed his to a blank black. After two days having those profile picture, they changed it back to their own ones.
- Their channel name "Unus Annus" is a Latin phrase for "One Year", which explains the channel's lifespan.
- Many fans claim that they will reupload and archive the videos made by Unus Annus, despite going against Ethan's and Mark's wishes.