for my big september tour (berner oberland, engadin, südtirol) i lent a gopro from a friend. she has no clue how to use it and never did. she thought it might be a good idee to take it with me and try it out. well, i will. so i made myself a gopro-stick. 50 cm in length.
Looks like the same model Gopro as mine ( 3+ ) , easy to use and very good quality videos. I have found adding an external microphone improves the sound quality. Good Luck
i did a special way of going under the swiss alps....rail-car-transporter! 18 minutes in the tunnel from the "engadin" to the "graubünden". open transporter, sitting in the 3w and enjoying the warm and very loud darkness. they charged me 20 sfr as a have a bike number plate. for a car, it would have been 33 sfr. totally uncomplicated and very friendly personel. thanks to the "räthische bahn"!!!