This video was shot by the FSA, it is believed to be that of an Assad drone manufacturing facility. The drones appear to be variants of Iran’s Ababil, or Swallow. The Iranian Abadil or Swallow is launched from the back of a truck using a pneumatic launch tube, so there is no need for a runway. A closed-circuit TV camera allows them to transmit a video feed back to a ground station.
Other items found at the site appear to connect Iran to the site; however, the accuracy of that claim can not be ascertained with any degree of confidence.
The video was flagged by @ZodiacRebel and originally posted Danger Room.