I need some help guys. Figured out how to change the icons in the now playing view of the media player. However, I can't find how to change the volume in the video now playing screen. Does anyone know where to find the file so I can replace it?

Plus my modified play, rewind, forward buttons are a bit cut off in video play back. Does anyone know how to fix it? Do I need to resize them or something or do they go in a different folder for video playback?