Are you seeing white+purplish lines spreading from bright areas to dark areas? That is CCD blooming. All digital cameras at this era should encounter the same symptom.

Usually in still cameras, the blooming effect will be recorded. In photo taking mode, the image processor is capable of filtering the bloom away.

Unless you can stop the bright light from spreading across the CCD in your camera, it's impossible to eliminate blooming effect for videos. Still photo can be processed to remove the blooming effect but current camera technology cannot process every frame of the video.
Film filter or IR filter will reduce the light passing through hence little blooming effect will be produced. However, those filters will alter the colour and brightness of your video. You won't want to see reddish brown or snowy white video right?