At the moment, it is not possible to play your videos on Android Auto, although the developers have managed to bring this feature unofficially. To watch YouTube videos, there is Cartube and to watch videos that you have saved on your mobile in Android Auto, a very easy to use application is Local Video Player.
Local Video Player is one of those unofficial Android Auto apps like AA Mirror Plus, IPCarTV or Fermata Auto with which you can do something relatively simple: send videos to the Android Auto screen as if It was sort of a Chromecast, something you should only do when the car is parked.
Install local video player on Android Auto
The first thing you’ll need is the local video player, which you won’t find on Google Play. The easiest way to install it is to use AA Store, an unofficial app store for Android Auto that makes the task quite easy. You can download AA Store from a Telegram channel.
After installing AA Store, open the app and you will find a list of unofficial Android Auto apps ready for download. Tap Local Video Player, then tap the Install button. If this is your first time using AA Store, you will need to allow the app to use storage and install apps.
The local video player is quite small, around 15MB, so downloading is fast. Once the download is complete, you will need to click Install to start installing Local Video Player on your mobile.
Now is the time to open the local video player for the first time, on mobile. You need to tap Continue and then allow access to photos and media files, otherwise you will not be able to stream the videos to the car screen. When you do, you can close the app.
Send video to car
Local Video Player works a bit like a Chromecast: from the mobile, you send the videos to the car, instead of selecting them on the car screen, as is the case with other similar apps. Therefore, when you want to see a video in Android Auto, you need to select it on your mobile in the Gallery app or similar.
Open the video on your mobile and use the Android share menu to choose the Watch on Car option, which will use the Local Video Player app to automatically stream the video to the Android Auto screen.
The best part is that you don’t have to do anything else and you don’t even have to touch the Android Auto screen at all. Playback starts automatically, automatically switching applications. Of course, you can tap the screen to advance or delay the video at a specific time.