I have android 4.3. Can I play mp4 file using any one of the built-in apps? I tried the "Play Movie" app but it doesn't show the mp4 file I copied into the movies folder on the phone. Should I copy it to a different location so Play Movie can find it? I know how to download other video players to view this mp4 file. But I want the simplest way to play a mp4 file on android because I'm sending this instruction to someone else, along with an mp4 file.