Hello,
Thanks for the video.
I took exactly the same way last year to install my Blackvue double channel in my G05. Otherwise, I prefered to took 12V in the trunk fuse box, much more easy to change the input power between car and external battery. It means just an additional cable between trunk and glove box where I installed a Multisafer to cut the power when the car battery reachs 12.1V.
https://www.ebay.fr/itm/MS-MultiSafe...53.m2749.l2649