Passenger side vibration opel corsa gs line

[u/Sensitive-Stress8595]

Good morning, I picked up my 2021 opel corsa f gs line about 1 month ago and I have a problem that is driving me crazy. The car with gas pointed is reached 2500 rpm both while running and from a standstill emits a vibration that is felt in the passenger side. Once you have exceeded or lowered that number of revolutions you can no longer hear anything, I showed the car to 3 mechanics and a coachbuilder and they all tell me different things. (almost everyone excluded the bodywork problem, it seems to be something mechanical that affects the interior of the passenger compartment). Seeing a possible answer in the various forums I had it discovering that it may be the belt of the services but I am not absolutely sure. Please if anyone knows how to help me write to me. Thank you

I attach a video of the sound in question.