Ivan Seeking said:
The vehicles were not flying perpendicular to each other. The plane was making a turn.
Closer to perpendicular than parallel, but in any case, the claim in the video was that they were flying in the same direction. No mention was made of the obvious fact that the plane was turning.
A video is not a crackpot claim, it is evidence.
We're talking about two different things here. I (and Rach too) am talking about the video linked in the OP, which is made by a UFO enthusiast and contains claims about the object, as well as clips from the cockpit video. You seem to be talking about the actual cockpit video shot during the flight. Clearly, one is just evidence, the other contains claims.
So again, the video linked in the OP contains claims, some of which may be considered crackpot claims by some people.
When a claim is made that is very clearly wrong, such as "You'll notice the cylinder seems to be traveling at about the same speed with the migs" - while showing the migs in a 70+ degree banked turn, nowhere near the axis of the cylinder, the video meets my criteria for crackpottery.
Also a good indicator of crackpottery is specious claims: such as the 3d animation showing the size of the object. The Mig-21 does not have radar, so they could not have known how far they were from the object, so they could not have known how big it was. That's very much like the Mexican Air Force UFO video (where they chased oil rigs that were something like 40 miles away). We all know how impossible it is to judge distances and sizes from the air - experienced pilots even make the mistake - and yet people continually just pull information like that, well, out of the air.
Since all of this is just guesswork, my guess is just as good as anyone else's: I'm going to guess that this is an American recon drone. However, without more contextual information, I can't rule out a simple hoax. And I don't mean a faked video - I'm sure the video is real - but all the contextual "facts" are provided by the narrator, not the video. We're
told by the narrator that the planes were launched to pursue this object, but we don't really know that that is true. This could well be a random piece of dirt on the canopy that slides of while the plane is flying, found by a hoaxter who built a story around it.