SendInfoToAPI: Added flag field needPostToApi to each video object. This flag indicates where need to send information to API method
     * This flag needed for fix double posting information to API after downloading webm and after downloading mp4 file for one episode.
        * For each episode downloaded two files in two formats (webm, mp4)
SendInfoToAPI: Added parsing JSON response from API for stopping downloading process if received status = "not created"