I believe the video file is retrievable simply by starting it back up. Google it, cause I had the same issue once and was able to recover the file.
I do a lot more video than photos and most of my photos are panos. While the preferred camera settings are different between video and photos, I’ve captured pretty good images at 1/50 or 1/60. Probably better to bump the ISO up and shoot a higher shutter speed. Typically, if I’m planning to take photos, I’d remove the ND filter and use a higher shutter speed, otherwise it’s not as sharp. Noise is fixable, blur not so much.
As a rule, if I’m flying, I’m running video, even between planned clips. That way, if something happens and it crashes, I have a cached visual reference for retrieval. Also, need to make sure you have cache available. I’ve run out on a couple occasions prior to a crash and not had a video to review.