Verdict: CarStream is currently the most reliable solution for streaming video on Android Auto, but installing version 2.0.6 "without root" has become increasingly difficult due to Google's security updates.
Traditionally, some Android Auto or mirroring solutions require root access for advanced features. However, CarStream can be used without rooting your device, although some limitations might apply compared to the rooted version.
Important Note: As of my last update, CarStream and similar apps might have specific requirements or might not work as expected on all devices or car systems. Also, ensure you're downloading APKs from trusted sources to avoid malware.
To install CarStream APK version 206 or similar without root: