Wierd Cold start noise

[Wijesunde]

Hello everyone

My gti started doin this wierd noise on cold startup.
 only 10 - 15 sec after start then its the normal tfsi noise
Cambelt kit changed 6000km ago
Camfallower and dumpvalve changed 1500km ago by me
I did a oil n filter change recently noise still there then yesterday i removed
The starter motor and cleaned inside and applied some grease to every bearings.
After fitting backin i started the engine n was happy wierd noise was gone.
But next day morning noise still there
Could it be a faulty startmotor?

Here a vid

[Wijesunde]

So i have changed the chain and all the parts that comes with it (adjuster etc)
+oil change with filter castrol 5w40 but same wierd noise on cold start or when car have seated more than 5 hours.
Just one error on vagcom p0441 which is for evap
New video

Anyone got some ideas?

[Wijesunde]

vacuum pump replaced fixed it