When you catch them in lies (or even errors) this big the correct conclusion to draw is that nothing they say can be trusted:
ABC aired supposedly shocking footage Monday and Sunday purporting to be from the frontline battle between the Syrian Kurds and the invading Turks. The only problem is: The footage appears to come from a nighttime machine gun demonstration at the Knob Creek Gun Range in West Point, Kentucky.
As J.D. Rucker said:
If @ABC News made a mistake, then their incompetence is startling. If they did it on purpose (and with the edits to the video, that seems to be the case), then they’re an outright evil group of bald-faced liars pretending to report the news.