

Huh? You can Airplay those. Not sure what do you want to stream there that would be a better experience than downloading it outright from Usenet or torrents.
Chromecast is fine for what it is and a very good value but it does not compete with Apple TV or Nvidia Shield.
Look into OpenCore Legacy Patcher. I updated my GFs 2012 Air to Ventura and it’s running okay. A bit clunky around MacOS updates since you have to specifically run patcher again to get graphics acceleration again but otherwise fine. It’s definitely worth it for security updates.
https://dortania.github.io/OpenCore-Legacy-Patcher/