I ordered and received this ND filter. It totally corrected my jello effect. I can't tell any different in color because the video looks amazing. It may have been more expensive than other options but it looks good and fits great. I don't want to DIY an ND filter. If I did it would have fallen off on my first flight..Lol plus you be a nice lense cap.
Here's a comparison video I put together for the RageCam Polarizer, ND-100 and UV filters as compared to nothing. I set the recording to Log so as not to enhance anything and set the settings for Shutter to have 0 EV on my Phantom 3 Professional