How to add a custom element to media Element Controls?

[ne0rrmatrix]

I am looking to modify the xaml for media elements transport controls. I want to add a button for full screen. I am looking specifically on how to customize the control template. I want to put a full screen icon beside the aspect ratio button and tie it to a custom control I have.

[CliffAgius]

Closed as per the Community Stand-up discussion here: https://youtu.be/N9wMcBP4jtg?t=2889 where it was agreed that New Features need to get above 7 upvotes within 6 months to progress to being reviewed by the maintainers.