My Nikon D3100 Video?

When i try and take video on my Nikon it goes off after 10 min. Is there anyway I can change it to constant video? And also is there anyway to get constant focus? Like if you move around it focuses automatically in video?

It stops at 10 minutes to prevent overheating the sensor, so there's nothing you can do about it. Your camera doesn't auto-focus during video either.you'll have to manually focus if you change the focus point often.

Remember that your camera is a dSLR. That camera's design was never meant to do video. If you are looking for video controls and features, get a digital video camera.

10 minutes is the time limit on your d3100 also… Your camera DOES AUTO-FOCUS DURING VIDEO reference your video or goodle "video autofocus on 3100"