Here's my 3rd seed found with a Dungeon in a Village (rare), right underneath a building. It contains a chest with a saddle and Music Disc 13. Also in the video are 2 more dungeons close to the surface and 5 villages. Enjoy!
That's pretty cool, thanks for sharing! Are the surface dungeons something that spring up in every settlement-enabled map or are they pretty rare?
I've learned through lots of seed hunting that surface dungeons are easier to find in deserts, because the sand blocks on top (ceiling) just fall when the map is first loaded. They are semi-rare I suppose, and I find them in about 1 out of every 6 or 7 seeds searched. They are super rare to find in sand villages, and I think I've just been lucky to find 3 in about a few hundred seeds searched. When I seed hunt, I just fly over the deserts in Creative mode and look for square shaped craters about the size of a standard dungeon.