Band mew Phanom 3 Advanced, first recording and there is banding on the video output
5 p.m in the afternoon. 30 degrees celsius, bright sunlight, no ND filter.  Have no idea what the banding on the clip is caused by.  See the YouTube link for an example of the shot.

I had these bands twice or so, mainly with the Sun near the field of view. Then problems increased, and finally, after only ten flights, the original SD card provided by DJI died. Now, more than 20 flights with a new 32 GB class-10 card, all bands and similar defects disappeared. Buy another card and check.

Cheers   m

This will happen when you dont use a sunhood around your camera or ND filters and fly against the sun. The props will create a shadow on your lens which will look like that. The solution is to mount a sunhood or ND filter or dont use it on sunny days : p