Sorry, I cannot hear a clunk on that video.
You may have to do that again, this time without ANY other accompanying noises (like windshield wipers)
is the differential rubber mount that takes the vibrations out.
what exactly does that metal compensator spring still do ?
It must be under more tension as you have lowered the car. There are rubber underlays (?)
Also both trailing arms are laid in rubber (#159), where they are attached to the body.
But I think Fonzi was about right.
the angles have changed and may be putting more strain on the drive shaft.
The center bushing is one, but maybe the drive shaft "donut" (front) may have cracks (some later models had them front and rear), causing some 'slop' withe the driveshaft hitting something.
It may also be as hidden as some play in the u-joint (built into the driveshaft (rear, I believe) .
TZ_280SEL described it pretty well (better than I would have)
NOW, I see there are more posts, so what I am writing /wrote maybe pointless.
But Good Luck anyway.