Lower one not meant to replace, and usually not necessary thank goodness. But it's still possible for a truly worn out one.
They do come loose sometimes though. There is a tack weld holding it into the mount. If you look up from underneath, you can see it through the open bottom of the bracket on the axle.
If you do the same thing and watch from underneath while someone is steering the wheel, you can see if the weld is still solid or has cracked. If cracked, the lower mount will move just like a loose or ill-fitting upper one.
For the upper, before you crank down too hard, i would still inspect it to see if it's worn or just is not sized right for the bushing sleeve. And also check the holes in the upper bracket for wear. It's very common for the originals to be wobbled out over time.
If it's a new drop bracket however, that's not very likely. Here though, the new drop brackets are more solid when they're welded, rather than just bolted.
Regarding the tie-rod ends. From your description they're just worn out and need replacing. Any visible movement is worn out.
And the rotation is very common to see when the ends are really worn and loose. There can also be rotation when the bars are not properly aligned, or the pitman arm or drag link are in different orientations than stock.
But mainly it just sounds like they're worn beyond their useable life.
Still, a good video would be cool. Good to see any other issues as well.
Paul