Add option to upload media

[WTFKr0]

Users should be able to upload an audio/video file directly through interface
The different fields must be filled with info, ex :

{
    "id": "4un7Jedpicg",
    "author": "Versus Music Official",
    "title": "Epic Legendary Intense Massive Heroic Vengeful Dramatic Music Mix - 1 Hour Long",
    "description": "",
    "length": 3812,
    "source": "https://www.youtube.com/v?id=4un7Jedpicg",
    "modified": "2017-11-08T14:33:28.613056973Z",
    "created": "2017-11-08T14:33:28.613057169Z"
}

This could be extended to upload an archive of multiple files (zip/tar)
The id format need to be reworked, it seems today is the youtube video id