Reelintension Go Pro Videos https://www.youtube.com/user/85stangbanger (plz like and subscribe)
If the camera isn't going in the water, don't use the waterproof case so you get some sound. Background music is fine, as long as you pick a appropriate one and it isn't loud. Edit, edit, edit! I cannot stand watching a first person video where they are reelling in a fish for more than 10-15 minutes. I can only watch your line/rod for so long before getting bored. Get a second camera if you can as well. Again first person gets boring, but if you can edit in video from a different angle (different perspective) it adds a lot.