Media playback/mute buttons in vr?

I’m currently working on a virtual reality project where I want to be able to play and pause video as well as mute audio. I have the node blueprint set up for the media player to work with a keyboard stroke, and I have a node blueprint set up for a button animation and have the button press to be set to the vr controller. I’m wondering how I can connect the two and have the media player activate when the button is pressed.
I was also wondering if there was a way to have a separate video and audio track play at the same time and then be able to press a button which would be able to mute and unmute the audio. What would be the best way to go about doing these things?