I'm saying "The Cavern Layer" here as if there's only one, but there's actually three. I guess the title would be more accurate as "Where is a Cavern Layer" or "Trying to Find a Cavern Layer" or "How Far Until we Find a Cavern Layer", but I'm sticking to the title I've given this video.
Other stuff also happens in this video, of course.
At this time, SeashoresWall has 2,524 views for Dwarf Fortress spread across 174 videos. His channel published over 3 days worth of content for the game, or 38.40% of the total watchable video for Dwarf Fortress on SeashoresWall's YouTube channel.