Well, how do they propose attached the Zoom H4N to the camera? For that, you will need a Hotshoe to tripod (1/4 thread) adapter - about 20$ - 50$.
The 50mm on a 1.6 crop sensor will give an apparent focal length of 80mm (1.6 X 50). I wonder if a better lens, though more, would be a Sigma 30mm. Also, the 50mm f/1.8 has a HORRIBLE sized focus ring that will be hindrance to getting focus on moving objects, w/o your fingers getting in the shot. Another reason why the Sigma might be a better option. Many users perfer the Canon 50mm f/1.4 for this type of work - good optic quality, smoother focusing,.. but the lens cost 330$. I've tried the 50 f/1.8 on my 5D mk II.... one time. After that, off it went, at least for video work.
Don't forget that with video, you will likely be doing manual focus, so a EF to Nikon mount can add all sorts of Nikon lenses to it from eBay. Moreover, the Nikon lenses on it while doing video will give you easier control.
