Could you support to add call back when video start, pause and finish ?

I think now it is really good library
however it could be nice if we have something like @brianegan
1. Allow to change/ customize the color of control bottom bar (now it is white)
2. Add call back when video starring play, pause and end
3. When video finishing play. It should show play button
4. Maybe let pause and play buttons in center both vertical and horizontal

The issue does not name files, tests, or an entry point. Start by locating the video controls and playback event handling, then check how the existing player exposes control styling and completion state. Done means the requested callbacks, post-finish play button, customizable bottom-bar color, and centered controls are supported and tested.

Written by the indexing model from the issue text.