I'm trying to shoot low light video on my RX100 m3 and I want to make the best of it. So it would make sense that the ideal setting (in many cases) would be to open the shutter for as long as it can be open for that frame. So if recording at 25 FPS video, then you would have the shutter open 1/25 seconds. That way you get max light in.
However I notice my camera doesn't mind having the shutter way slower than that number, I guess that means that it actually spills same information onto several frames?
If I set it to 1/25 does that mean absolute maximum. OR does the camera perhaps need a few milliseconds between each frame and therefor 1/25 for 25 fps video is too slow?