It looks fake.
Sorry, but that's just the way I see it.

Honestly the guys who came up with this are wankers. It is so obviously fake that I have only looked at it once. The "aircraft" doesn't even fly in a straight line, and yes I agree its an image of a real aircraft that has been really badly doctored. They spent more effort on their logo than on the rubbish they are putting out. The siren should have gone off in everyones head when the word 'subscribe' flipped onto the screen. People like this just piss me off. They aren't uncovering anything, they are carpet baggers selling snake oil. Preying on ignorance, fear or in some cases mental disorders to promote something as fact(s) and ask people to give them money in return. Its one of the reasons I take great delight in mercilessly hammering perpetrators of this rubbish when I come across them, or hard core fanatics who shout down anyone who try's pointing out the obvious that it's BS they are promoting.

Negative 1 out of 10 for their efforts here.

LEE.

There are test platforms where they will attach a new cockpit or canopy design to the front or tail section or even an experimental aircraft to the rear or belly of the aircraft etc but that is not one of them. It looks completely fake. There isn't enough power on that plane to propel something like that. Even that slow. The wings would never sustain lift on something that long.

it looks like a flying crusifix id say its a drone prototype are something

Looks like some weird dirigible at a lower altitude being towed by something comparable to a Fokker F27 flying above it. (I've seen "fast" R/C airships comparable in shape. One maker of such calls it a "hyperblimp" and has a related website.) But not sure how well something like that could even work in practice at a much larger scale.

If the guys posting the video are known for hoaxes though, than that seems the more likely explanation.