Hey there kid-a78,
I apologize about the late response, thank you for being patient! Were you able to find the answer to your question about Google Cast? If not, I'd encourage you to check out the Google Cast Developers support page. You can ask Google Cast developers questions on Stack Overflow using the google-cast tag.
I hope that helps you out, and if you have any other questions or concerns for me, please let me know.
We haven't heard back from kid-a78, and it's been a few days, so I'm locking the thread. As always, feel free to make a new thread if you have any more questions or concerns.
Have a good one!