I wasn't around back then lol, "Vlog" just sounds like a cool word (And probably refers to like a blog of videos or something? IDK, whatever it means, it's probably more transparency between the staff and players)
"Vlog" is "video blog." It was around during the transition from Vailor to Axios, and it was created on YouTube by BGBuster (YouTube channel name is that, too) to update players on things relating to the map change. It stopped the day we arrived in Axios.