It depends.
If she wants to sit in front of the camera, locked off, the DSLR may work. What I've been finding out is the more motion in the frame, the less DSLR's (I really research Nikon, not as sure about canon/sony alpha/etc) can deal with it.
You can't really handhold a DSLR in video mode. So, you need a 'rig'.
Because the mike, even shock isolated, is in the camera body near the motor, it is almost impossible to get rid of the noise.
Also, your Nikon may not have mic in, or it may be mono only. Most people run a pocket recorder on a shotgun and then synch the two in the editing software later.
Lastly, I haven't been able to really work it yet, but everything I read says the AF function on the Nikon in video mode is... lacking. You also can't change aperture while in live mode, which is a huge deal (you should leave the speed at 40 or 50 depending on which camp you follow).
That's why I asked the question I did. In the time it takes to rig my 7000, I can pull the betacam SX out of the bag, flip a couple of switches and be running. I just can't log that format any more with the laptop I'm using. I want a 4-5 year old HD ENG handheld camcorder, preferably recording to cards. I want to pay about... nothing for it, too. lol
It's disappointing, because you see all these people shooting all kinds of stuff with the canons, I had hopes when I bought the 7k that would be the end of the body line for me for awhile, yet here I sit researching, trying to find something that will work for me.
Having said all of that, I know several successful youtubers that just use their smartphone or a basic box-type 'muvi' type video camera. Not very sexy to operate, but they aren't hung up on technicalities, just content. So, they are happy to mash a single red button and off they go.