: Sites like Pixabay offer thousands of free royalty-free 4K and HD ocean clips that can be used as live backgrounds.

Select your video from the "Live Photos" album and ensure "Live Photo" is turned on before setting it as your Lock Screen. :

: Creators on TikTok and Pinterest frequently share "Ocean Triangle" or geometric marine designs for mobile devices.

: Ensure the video is a seamless loop to avoid jarring jumps when the animation restarts. Underwater Live Wallpapers 4K - Ocean & Aquarium

: The Microsoft Store and mobile app stores host specialized software like "Underwater Live Wallpapers 4K" which include performance-optimized marine scenes. Setting Up Your Wallpaper

The process for applying a 4K live wallpaper depends on your device: :