It's just something done on some photography forums
Photography is different, it's fixed, one frame, and still. Setting suggestions are of some use to learn. Video has motion, of course. Lighting always changes.
As you fly different directions with different camera pitch, the light changes. You have to make the decision, do you want to manually fuss with exposure every time you turn the corner, or come into or out of a shadow, or pitch the camera up to include sky, or down to remove the sky? Are you that quick? Will you be able to keep the forward motion while making such adjustments? That really takes a lot of work, and skills. It also takes the 5 way button on the M2 craft, or RC Pro to do it real time. IMO it's not worth the trouble when auto exposure will do a good job.
I advise you to simply use the auto exposure all the time for general flight captures. Sure, the expose will suddenly change in the video. It shows up because the camera is automatically changing to the correct exposure. You can anticipate this with experience by flying into shade, or toward the sun, or pitch from having lots of sky to no sky in the view. All these things change the exposure. With auto, you have the ability to change the overall exposure little my little, if you deem it necessary, but lighting can also be adjusted to slight differences in post edit too.
If you don't like the sudden changes to show up in the video, simply edit them out and do a cross dissolve transition. Generally speaking the auto exposure works good for moving video from a drone. It's the least hassle, and the most effective for VIDEO.
With a standard auto exposure you can easily adjust the light and exposure with FREE Davinci Resolve, and most other editor apps. You
don't need a raw capture to adjust lighting, saturation, highlights or contrast. Raw simply makes the adjustment capabilities a little more effective, but not that much that normal people would actually notice a difference, IMO. Especially in 1080. Raw is for commercial work, not worth the time and expense for recreational hobbyists, IMO.
The post edit adjustments are how you make an OK video turn into a great video, increasing clarity, contrast and saturation to your preferred look. That takes a little time to learn, but that's where you should plan to optimize things. For FREE DaVinci Resolve or $20/mo Adobe Premier Pro, there are many videos on YT that quickly show how to color grade.