Thanks @HippoDrone for making me feel welcome!Hi @Tank welcome to the forum. Hopefully you will find all the information you need on here.
As for the 4k, that is the cameras maximum resolution, and it will look nicer than HD or 1080. It will use up your battery and memory card faster though.
Most people record in 1080 at 60fps as it takes up less storage space and still looks good, but there is a very noticeable increase in quality at 4k![]()
I'm so sorry for not having answered your kind inputs! I've changed the fps and it's indeed much better now.120fps is really only for if you want to do slow motion shots, 60fps would be better (and allow a nicer image when in lower light, 30fps is best for dark lighting). The image stabilisation on a lot of cameras can cause a bit of "seasickness" to viewers. Where are you mounting it?