https://youtu.be/0vwqJlAp4a0 That is my latest video but if you look at my channel all but 2 videos are recorded on GoPro.
I use a GoPro Hero 4 Silver. I recommend it for fishing because of the touch screen feature. If you fish for a while and it is filming with no fish, you can use the touch screen to delete the unwanted footage right out on the water. You can Also quickly view footage to make sure your camera angles are right. I film on 1080/60, although I noticed YouTube is now supporting 4K so I may change to that in the future.
All of my videos have the head mount which gets great POV shots, however I recently purchased the suction cup mount made by GoPro and it's pretty awesome. It allows me to mount it anywhere I want or bring it if I am on a friends boat. I don't have any videos out with it yet but I have filmed with it and I will be posting the video in a month when the Detroit River Walleye run is finished, it's a compilation video.
Other than that have fun, it adds a whole new dynamic to fishing!