I use a Hero8. I am usually at 1080p wide, in a chest mount. I find this gives me the best balance for stabilisation and file sizes. I don’t worry about frame rate or ISO - I just let the camera sort that out.
I only record in short-ish bursts. Nobody wants to view 30 mins of a POV shot (unless it is an epic 30 min descent).
You should also consider the sound on your videos. Endless wind noise is massively annoying for viewers. Gopro sound is generally appalling. It’s even worse if you are narrating your ride. On the Hero8 I use a media mod which provides me with a mic in socket. Into that, I plug a Rode Wireless Go II receiver. This comes with two transmitters with wind baffles. I clip one onto my rucksack strap, and if I’m riding with a pal I clip the other to them. This provides really good sound without excessive wind noise, picking up conversation and ambient sound really well.
Example 1:
Example 2:
Sometimes it helps to have a drone as well. When shooting with a drone (which has no sound pickup for obvious reasons), sync the video/audio with your Gopro by setting both Gopro and drone to record, point the drone at yourself, and clap. You can then sync the motion of the clap on the drone with the sound on the video and have everything nicely syned.