After watching those videos, I think you're ok there personally. You're track bar will move when you loosen that bolt, fyi, You may have to adjust that back the way it is. The trackbar keeps your axle centered under the Jeep, and with the coil springs, your axle will want to naturally favor one side, so.... to get it centered, that bar will be under 'tension' in its correct position which is why it was hard for you to get the bolt out.
Did that lower bushing have any movement when the vehicle was still assembled while someone turned it. If not, there's nothing wrong with that end of the track bar.