[imagine2frolic]

Get everything down to clean metal, tack it with a splatter shield, and take it off the car. It takes more time, but it is worry free. Plus you can get a lot more weld on the parts.

I am wondering how the exhaust is mounted? On some very firm brackets? I have mentioned this a few times here. There are some tongue, and groove brackets that allow the system to slide back, and forth a bit. They keep the system from going up, and down though.

By the video you shared it appears you need a forgiving bracket that will allow some movement. If you want this failure to stop, you may need to go to a different bracket. If you want I will bring out the camera, and take some pics of these type of brackets. Any muffler shop can get them for you. They come in many different configurations. Good luck with the project.