Have you tried CarStream 2.0.6 recently? Share your experience in the comments.
: Supports playback for YouTube, Plex, and local video files stored on your phone (MP4/MKV). carstream 2.0.6 apk
Officially, Google blocks video apps on Android Auto for obvious safety reasons. Watching a blockbuster movie while doing 70mph on the highway is a recipe for disaster. However, commuters and passengers argued that watching a YouTube video while charging the car, or listening to a video essay while stuck in gridlock, was a valid use case. Have you tried CarStream 2
CarStream 2.0.6 APK: The Ultimate Guide to In-Car Video Streaming Officially, Google blocks video apps on Android Auto
CarStream is a modified version of the now-defunct Screen2Auto app. It allows video playback (primarily YouTube) on Android Auto head units – even while driving, which is why it exists in a legal gray area. Version 2.0.6 is one of the last widely circulated builds.