Meet Eddy Cloud. It allows you to create a personal streaming service with Dropbox, GoogleDrive, Box, OneDrive, Yandex.Disk, SoundCloud and even your personal WebDAV server.
Eddy collects multiple cloud drives in one music library automatically. Just connect your current cloud drive: Dropbox, GoogleDrive, Yandex.Disk, OneDrive, Box and even WebDAV server - and all the audio and video tracks (only sound stream) will be added in a sec.
BTW, you may connect as many accounts of each cloud drive as you need. 20 OneDrive storages? Not a problem! And you will have an access to the music on each account of each cloud drive from ONE library. Eddy really unites your music!
https://goo.gl/fMD7P9