If you see this message when you go to stream a clip, that means that it is currently not available for streaming and needs to be downloaded to your device. Clips4Sale has a massive library of clips and not all of them are ready to be streamed yet.
NOTE: Creators are allowed to remove their content whenever they choose. You are encouraged to download your clips after purchase, even if the clip is streamable, so that you can still access them if they're removed from the website.