Go to Settings > Modes and Routines > Routines . Create a new routine: If Charging status is "Charging," Then change the Lock screen wallpaper to a specific video or animation from your gallery.

Extract the contents into the .tmp_update folder on your SD card.

Apps like Pika! Show or Battery Charging Animation 3D allow you to download and apply professional-looking animations without needing to flash a ZIP file.

Manually flashing ZIP files or modifying system folders can make your device unbootable if done incorrectly. Always backup your data before attempting a system-level fix.