Gymnart 4 years ago I just downloaded and installed the Vimeo app on my Android phone (it runs Gingerbread). I tried to play my public videos but the app just gives me an "unknown" error. I then tested the app by viewing other videos from the site and they played fine. my droid phone has a video player that can handle mp4's and many of my videos were made as mp4's, so they should be able to play but they won't. How can I pinpoint what the problem is?