Thank you for your fast answer.

Still some work to have a working video afterwards. I hoped it was easier

Samsung s10e - Android 10 - One UI-Version 2.1
Patch April 2020
Custom ROM "HadesROM"

App is starting and recording rounds.

Hey there, I did connect the camera to the App (Grandprix, Android 10, S10e): - Connect Smartphone manually to the GoPro WiFi (password for WiFi can be found in the camera) - kill the GoPro App - Go to settings and chose GoPro 7 Black as external Cam - MultiCam Standard "Main Film" leads t...