https://www.techsolutions.support.com/how-to/how-to-cast-content-from-an-android-phone-or-tablet-12537
How to Cast Content from an Android Phone or Tablet
Learn how to cast content from an Android smartphone or tablet to a display with Chromecast Built-in or connected to a Chromecast media player.
how tocast contentan androidphonetablet
https://chromium.googlesource.com/chromium/src/+/71.0.3578.80/chromecast/renderer/cast_content_renderer_client_simple.cc
chromecast/renderer/cast_content_renderer_client_simple.cc - chromium/src - Git at Google
cast contentchromecastrendererclientsimple