A missing piece
After the initial shock of seeing his parents on screen there were a few things that Quinn started to notice. For one, their age, the reason why he was so easily able to recognise them, was because they looked exactly like they did, before they had left.
As the years went past, the memories and their faces were disappearing from Quinn's mind, but the brain was a strange thing because as soon as he saw them, he knew they were his parents and the memories of them started to flood into his mind.
Yet, why would they look the same, unless they were vampires, but even then they would need to be original vampires to keep up their appearance, but then why wasn't Quinn born a vampire?
In the end, looking at their clothing gave the answer away. It was simple, this was a video from a long time ago. The two of them were wearing military uniforms which didn't have a hint of beast gear on it.