Thanks again, Nigel!
There is little point in using 4:3 for a dashcam unless you want to use a lot of your card space on the sky, your car bonnet and dashboard! For other video 4:3 can be useful, especially for the stars in the night sky or clouds during daylight, but most people have a 16:9 monitor/TV and 4:3 is not a good fit...
--- --- I have set mine to wide. So, that is good.
For use as an action camera, 60 fps is normally preferred and that means using 1080 resolution. For a dashcam it is better to have longer record times and use 30fps so that there is less chance of events you want being overwritten, then the higher the resolution the more chance of a number plate being readable, but the faster the memory card will loop so the best choice will depend on your driving and memory card size.
--- --- I have set mine to the highest resolution at 30fps for dashcam usage, so that's good too.
--- --- I have got a 64GB, class 10
You also have the bitrate option which can use more or less card space in return for more or less video quality, the default is a reasonable compromise but if you want great quality then turn it up. I wouldn't turn it down for dashcam use since you will loose a lot of quality at higher speeds.
--- --- I have set mine to high. So, that's cool.
For dashcam use, you can customise the menu button as a file lock button so that you can protect events from being overwritten by the loop recording.
--- --- Ha... that's what I have done too.
It seems that I have set mine more or less as what you mentioned as dashcam. I am happy. Cheers, Nigel!