Hi,

my new Cinelog35 crashed during first flight, well it was a 15sek flight.

without any reason one motor spins up to 86% and the quad fell to ground.
I Have a Blackbox recording, maybe someone can help.

That looks like motor 1. Typically that behavior means that motor was not providing enough thrust so your FC kept asking it to give more power. In your video, did the rear right of quad suddenly drop, and if it quickly sommersaulted to the ground it might have been a motor desync. If it was a more gradual dip or slow sommersault, did the prop break or possibly some debris was stuck in that prop/motor? Is motor 1 spinning normally now when you test it in BF?

it was my first flight with this drone, very smooth and carefully with the sticks.
The accident came out of nowhere.

Nothing broke and worked as usual at home.

it looks like the motor1 (rear right) got stuck and the FC tried to speed up this motor