I have not been interested in using the video capability of this camera after an initial trial at the beach where thei was using searched for focus and made a horrible noise.
I have been using my 150 -500 for birds and the birds in my yard come quite close to feed. I have found that if I lock the at 150 and have the camera on or off a I can get lovely short vids of the birds action.
locked at 150 it becomes a very useful video set up. It is possible to trim the video etc in camera too. now I just need to get the videos onto a dvd with some photos to make a good tv display