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I have this problem in my FPS game where I want to change camera's FOV but it just kept going back to what it was before. I tried to insert keyframe of the FOV but it doesn't have the option of "insert keyframe". The first thing I saw when I tried to insert a keyframe on the FOV is "Reset to Default Value". I tried that and it still doesn't work, help!! (please!)
change the Lens Units from Field of View to Millimeters in the dropdown next to the FOV / Focal length field. Then FOV will turn to focal length, and that field is keyframable
I'm sitting, waiting, wishing, building Blender in superstition...