Check your DoodStream Dashboard to see if the video is still active and "Completed" in the transcoding queue.
If the issue is server-side (like maintenance), there is nothing to do but wait for the developers to restore the service. If you are a webmaster/uploader : S1026 - DoodStream
DoodStream frequently undergoes updates or server migrations. During these periods, certain clusters of videos may become temporarily unavailable. Check your DoodStream Dashboard to see if the