Riteshp2001/mpvRx ? reverse-engineered prompt

Build me a polished Android video player app based on libmpv that feels powerful but clean, with no ads or trackers. I want the player to support local video playback, playlists, chapters, picture in picture, cast to Chromecast or other Google Cast devices, and a really customizable control layout.

Make the playback experience feel special, with smooth gestures for seeking, volume, brightness, pinch to zoom, subtitle dragging, and subtitle resizing. Add lots of themes, including dark and AMOLED black options, with Material 3 style visuals and nice animated controls. I also want advanced subtitle features like multiple subtitle tracks, online subtitle search, font and styling controls, and the ability to turn subtitles off directly.

If possible, include useful extras like ambient mode, audio and video tuning, and a settings screen where I can tweak the player behavior without leaving playback. Look up current docs online if you need to.