G'day.
I noticed in my past video footage that the propellers produce glare on occasion. It seems to depend on the Sun angle, ground level or at altitiude.
The Spark props are half glossy. I might try a matt black 'texta' over the props & see if the relections are reduced?

Any ideas?

weird, I have never seen that in my videos.

Maybe consider one of those lens hood things?

like this

Good day. Thank you for that information. You can use a matt black colored propellers as long as the propellers is from DJI. Just remember if you will use a 3rd party device it might affect the performance of the drone.

You can also try to adjust the gimbal pitch to avoid the glare.