Strange rattle in back of '01 986S

[heymanwatchthis]

Thanks everyone for the responses. When I had IMS upgraded the clutch was replaced and bearing etc serviced. Tomorrow I am taking it back to the shop that did the work to put on lift and check out the car. I am also having them replace the motor mount - in the video you can see the exhaust tips move a great deal - motor mount is likely shot and causing a lot of motor movement. Will see how this works. If the exhaust has a rattle inside, will present a perfect excuse to install Top Speed exhaust and secondary cat deletes! I will post after visit to shop tomorrow.