One should be able to set video settings permanently. Silvan Melchior's approach can be seen below. Those could be activated for temporary changes.

I am not sure if those settings are working. I won't test them, since I want them changed!

Resolutions:	Load Preset: Select option... Std FOV 16:9 wide FOV 4:3 full FOV Std FOV, x30 Timelapse Custom Values: Video res: xpx Video fps: recording, boxing Image res: xpx
Timelapse-Interval (0.1...3200):	s
Sharpness (-100...100), default 0:
Contrast (-100...100), default 0:
Brightness (0...100), default 50:
Saturation (-100...100), default 0:
ISO (100...800), default 0:
Metering Mode, default 'average':	Select option... Average Spot Backlit Matrix
Video Stabilisation, default: 'off'
Exposure Compensation (-10...10), default 0:
Exposure Mode, default 'auto':	Select option... Off Auto Night Nightpreview Backlight Spotlight Sports Snow Beach Verylong Fixedfps
White Balance, default 'auto':	Select option... Off Auto Sun Cloudy Shade Tungsten Fluorescent Incandescent Flash Horizon
Image Effect, default 'none':	Select option... None Negative Solarise Sketch Denoise Emboss Oilpaint Hatch Gpen Pastel Watercolour Film Blur Saturation Colourswap Washedout Posterise Colourpoint Colourbalance Cartoon
Colour Effect, default 'disabled':	Disabled Enabled u:v = :
Rotation, default 0:	Select option... 0 90 180 270
Flip, default 'none':	Select option... None Horizonal Vertical Both
Sensor Region, default 0/0/65536/65536:	x y w h
Shutter speed (0...330000), default 0:
Image quality (0...100), default 85:
Raw Layer, default: 'off'
Video bitrate (0...25000000), default 17000000: