If you are using Lightroom to load RAW images and convert to JPEG, any settings you applied may be impacting the image. That includes auto levels and sharpening.
I would not use ADL on High if you are using Lightroom unless you are creating JPEGs. With RAW files, Lightroom ignores the ADL setting, but the exposure is 0.7 stops lower than the exposure the camera would normally apply. No curve is applied to recover the shadows. And with an underexposed image, auto levels or other steps can create noise.
Video images are lower resolution than your photos. Having more noise in video would not be unusual - especially if you are underexposing the image. I'm not sure how ADL and other camera settings would work with video.