I am about to try out filming with the D7100 using Nikon 18-70 mm. As I have no real filming experiance what number of FPS is used also I believe it is best to control the sound manually.
His last time to log into this forum was 02-07-14 so I don't think you are going to get a response.
I have done several videos with my D7100 and have been happy with them. The only thing I would suggest is an external microphone. I have a lavalier microphone and also a mini shotgun style that mounts on the flash bracket. They both get a lot better sound. The video has always been great.