Clutch/gearbox rattle

My 2018 1.6 TDI Octavia had clutch replaced last year due to rattling noise. I also had difficulties in changing gears. Thisss week I had transmission mounts replaced since gearbox made whining noise. At least the whining noise is gone but I just noticed that the clutch rattle is back!

The noise disappears if I press the clutch. Also it's not always there. Sometimes I have to press the clutch like five times to make the rattle audible. I found videos on Youtube and people said that this is a normal sound with single-mass flywheel which my car has. Is that correct? I still have two months of warranty left but I have zero trust in my car if I have to replace the clutch every 6 months.

Video of the sound:

https://youtu.be/srlwot_Wj6E