Record in brighter lighting
Use a lower ISO
Use a faster lens with a wider aperture
Stabilize the camera to avoid motion blur
Expose correctly to avoid underexposure
Use a higher-quality camera or sensor
Shoot in the camera’s native ISO
Avoid excessive digital zoom
Use manual focus to prevent hunting
Reduce compression by recording at a higher bitrate
Use a flatter picture profile if available
Apply temporal noise reduction in editing
Apply spatial noise reduction in editing
Use denoising plugins or software
Mask and denoise only noisy areas
Sharpen lightly after denoising
Export with a high-quality codec
Avoid multiple re-encodes
Clean the camera sensor and lens
Reduce heat buildup in the camera
Use proper white balance settings