MX Player is a great app for playing videos on Android, it will just about play any video format. The app has just been updated to version 1.7.14 and adds an Android 4 style UI. There are also fixes for ogg video playback and improved network subtitle file loading.
1.7.13 CUSTOM CODEC IS NOT COMPATIBLE WITH 1.7.14. PLEASE REBUILD CUSTOM CODEC.
Added Android 4.0 compatible ui mode for Android 4.1 and higher.
Added an option to double-tap the back button option to close playback screen.
Improved network subtitle file loading.
Fixed broken ogg video playback (.ogg .ogv .ogm)
Fixed broken touch actions on devices having soft main keys.
Pro version can be purchased from product home page even if device is not certified by Google.