Best alternatives to play multimedia on my iPad?

[iRock1]

Hi,

I need an app to play multimedia (audio and video) on my iPad Air (iOS 9.3.3). I need it to cover the following points:

• Ability to exit the app and keep playing video on the corner (that something on something feature...)
• Compatible with iTunes File Sharing
• Ability to organize files in folders

The following points are not deal-breakers but would be nice to have:

• Multitouch gestures
• Free

So far I've tried VLC, KMPlayer and GOM Player. None of them support video playing after quitting the app.