GoPro 8 is a beast. To keep file size as small and youtube friendly as possible try the following:
RESOLUTION at 1080
FPS between 24 or 30
LENS depends on where you mount the GoPro but usually either SuperView or Wide (to show more of your machine and lots of scenery.
HyperSmooth On
Another cool thing to have and it only works when editing your clips on "GoPro Quick" is to add gauges that show your speed, route and other things. To be able to add those gauges to your videos you must have the GPS turned On in the camera when you film. Keep in mind the GPS will consume a bit more of battery.
As ease of access goes you can control and see what your camera sees from your cellphone. You'll need GoPro Quik app installed in your cell, to have the wifi turned on in your phone and camera (don't worry you don't need internet service or signal, this is just for the camera and phone communicate in between them.) That will give you a sweet remote control.....but it does increase battery drain.
Hope that helps and if you have any questions I am here to help.