The US helps transporting IS fighters in Syria.
The US-led coalition is often accused of supporting terrorist groups in Syria, however there is never any evidence given. The helicopter shown in the video is a Sikorsky S-92, not used by U.S. military forces. Tyler Rogoway of Aviation Intel, on Twitter, has identified the helicopter in question as having been registered to a U.S.-based firm. The article provides a photo of what appears to be the same helicopter with members of the Asayish, the police force of the Kurdish Syrian Democratic Forces. If this is indeed the same helicopter and it is used by members of the Asayish, there would be nothing unusual about it visiting a prison in al-Hasakah. There is no reason or evidence given to assume the helicopter is evacuating Islamic State militants. Further debunking at Polygraph.info https://www.polygraph.info/a/isis-in-syria/29066277.html.