title: AVAsset Unsupported URL
body: <p>I am trying to load a video downloaded from the internet stored in the Documents directory. However when I try I keep getting: error: Error Domain=NSURLErrorDomain Code=-1002 "unsupported URL" </p>
  
  <pre><code>let dstURL = URL(string: dstPath)!
  let asset = AVAsset(url: dstURL)
  asset.loadValuesAsynchronously(forKeys: ["tracks", "playable"]) {
      var error: NSError?
      let status = asset.statusOfValue(forKey: "tracks", error: &amp;error)
        if error != nil {
            print("status: \(status), error: \(error!)")
        }
      }
  </code></pre>