Taking high-quality videos and photos under the water can be quite challenging, which is why you need to invest in a camera that makes the job a bit easier.
It would help if you ensured that the camera’s sensor could take decent low light images, considering it’s darker under the water. CMOS sensors are perfect for that. They can capture much more light than traditional sensors.
Moreover, your underwater camera video resolution should never be less than 1080p if you want your videos to be clear enough. A decent level of video stabilization for action videos would be highly appreciated too.