not look like a bad hit in the video or at least you can’t really tell.

My thought is that, regardless, there has to be a little more to it. You mentioned that he is a UFA. Maybe they were already planning to cut him?

The video sucks but from what we can see, it really doesn’t look that bad. If you have another angle, please share. To me, it certainly doesn’t look egregious. Getting carted off on a stretcher doesn’t mean much. It’s football. The dude could have hit the ground hard or at the wrong angle.