You asked
Is the nikon d750 good for video?
I haven't covered the D750's video performance on this site, so I can't tell you how it shoots. The camera has no stabilisation in the body, so for handheld work you'd want a stabilised lens, such as the Nikon AF-S 16-35mm f/4G ED VR for wider shots or the Nikon AF-S 24-120mm f/4G ED VR for everyday use.
Before you buy, check the camera against my video guide. Look for a screen that flips to the front, a microphone input, and a light body. The D750 is a fairly heavy DSLR, so it suits tripod and rig work better than arm's-length vlogging. Whatever you choose, budget for sound from the start.
Written by Claude from this site's pages.