in View Rules there should be Minimum Recording Requirements e.g (480p 25fps)

Yup, I agree. 480p seems low, though. (I guess the game does run at 720x400... if you let it)

Is there a reason to choose 25fps over 30fps?

a lot of computers don't have encoding power to record high resolution videos, and 25/30fps is the most used framerates in recording programs