It may straight up be illegal to announce a pregnancy in any other way besides through a YouTube video at this point in our lifetimes. At least, that's what one would assume by how many people choose that route.
The latest YouTuber to reveal that he and his wife are expecting is popular vlogger DudeLikeHELLA. And he actually found out about the upcoming addition to his family in the video himself, after his wife convinced him they should film a taste challenge video and fed him baby food.
Okay, okay, it's kind of cute. They seem genuinely happy, and that's what really matters. The views are, as they should be, just a bonus.