I'm sorry I don't follow you. In order for anything to change direction a force would needs to be exerted in someway.
My theory was if someone can take all the frames of the video and stitch them together so it shows one big image, then track this balloon type object - how much does it change direction, but I don't think it would change all that much or even at all. How much does a hot air balloon or one of those weather balloons change direction when you pull on the ropes? It moves, but extremely slowing, mostly due to air drag and inertia of the gas+balloon material (+payload) I guess. So an effectively (but not actually) unstoppable force (balloon+ropes+payload) gets hit by a missile on the ropes and gets tangled for a moment, but due to the forces involved the rope or ropes snap and you end up with the missile with a curve and a balloon, ropes and payroll carries on.
This was how far I got until

:
Metabunk
https://www.metabunk.org/threads/uap-hearing-new-video-yemen-orb.14427/page-4 has a few theories but recently it sounds more plausible that the missile isn't coming in left to right but from a high angle, away from the camera at very fast missile speed. So the missile is travelling from high up (say 6 miles up) to the object (say 3 miles up) and the change of direction in the missile now seems way more plausible, the missile only had a very minor change of direction (1 or 2 degrees) but because we're viewing the motion of the missile from behind the direction change looks more extreme, like a bullet deflect/ricochet in a video from The Slow Mo Guys.
This came from:
https://www.reddit.com/r/AirForce/comments/1ncmuuv/this_video_of_a_mq9_drone_firing_a_hellfire/
- It's a balloon.
- It's not moving very fast, it's a visual parallax effect.
- It doesn't deflect the missile, the missile pierces through and keeps going because the fuse didn't trip
- The missile is actually coming from the direction of the camera and curving, what you're seeing is the back of the missile not the side.
- The balloon isn't still flying, its falling at a rate you'd expect deflated mylar to fall (hint: it's not fast)
This was the reason why the team gave the video to the internet wasn't it? To come up with some insights into the video they may not have thought of. We only have the data given so far though. The 'Trust Me Bro' content remains behind a paywall or something.