ROCK PLAYER 2
This is one of the most popular and top-rated video player apps on the Apple App Store. It supports multiple format videos including mkv, avi, rmvb, flv, wmv, mov. Mp4, mgp, divx, etc. along with mp3, wma, aac, for music. It also support file import for playback from iTunes. The free version offers ads. For an adfree player, users can upgrade to the paid app.