Playing media from a Media Source (within media player card)

Wondering if its possible to add the ‘select media’ button for all my media entities?

I’ve linked my Shared Media to Home Assistant so I can select my Office TV, then the media icon and select a film to cast… but I can only do this on certain media players?

I’ve tried the custom media player but again this only shows for certain media players

Office & KDL has the media icon, none of the others do

That’s only available for integratios that have implemented it. Also casting only works for certain integrations.

Thanks…

I’ve looked into the integrations and they’ve all been auto-populated by Home Assistant.

I’m further confused that the ‘Office TV’ & ‘Matthews Room TV’ are both Google Chrome Cast devices, but I only have the option for one.

So when using this ‘browse media’ button on the Media Card I can select local media
image

When it’s playing, it’s using my NubaCasa remote access url to share/cast the video

So is there a way force this when selecting the media?