Chapters, Chromecast, edit time frame boxes ( color), volume icon change

Hi!

We would like to make some adjustments to the player.

• Chromecast is not being displayed, we would like to add this to our player
• We would also like to edit the timeframes from a black background to transparent one, without changing the color of the letters inside the player
• We also would like to change the volume icon , to a nicer looking icon.

Any idea how we can achieve these things?
Thanks for the help!