The camera that I'm using is an Olfi. It's their original or first camera that they sold it came with a few mounts and accessories in a semi hard pouch for £150. They now have a newer model, both cameras I believe are rebadged Chinese cameras the current model I've seen has an SJCAM M20. Both are well-specced cameras 4K, HDR, Gyro stabilised and in general picture quality is excellent I run mine at 1080p 60. I do find it sometimes overexposes bright skies but hopefully, from the video, you can see the image is quite smooth with the Gyro stabilising on and the colour is good.
Olfi is a Welch, or in Wales company, they offer pretty decent support, I brought the suction cup which they sell for the camera which sticks like a limpet to a rock along with extra batteries and charger. I've had the camera for about a year now and it gets used regularly for all sorts thrown into rucksacks and plunged into the water in its waterproof housing, it's pretty quick to start up and ready to record in an instant. There is, unfortunately, no external mic input so not so good for any would be vloggers.
