___live_bg_01_tit_grabbing.webm -

This is a "Live Background." Unlike static images, these provide movement to the scene to make it feel more immersive.

Finding the for your specific game version. ___live_bg_01_tit_grabbing.webm

If the file is hidden inside a .rpa archive, you will need a tool like rpatool or UnRPA to extract the raw video file. If you'd like, I can help you with: This is a "Live Background