Wei Zi, don't make a video.

If it is mainly used to shoot videos, it is not suitable to buy a SLR. It's not good to take pictures and videos with a SLR, which is far less good than a camera. Cameras are specialized in taking videos, taking photos is a sideline, SLR is specialized in taking photos, and video is a sideline. I suggest you think it over, don't make a wrong classification, or even the best products won't suit you.