MicroG is a free and open-source alternative to Google's proprietary Play Services framework that is required by YouTube Vanced. While MicroG can provide the same functionality as Play Services, it is not directly related to Vanced and is not an alternative to it. If you're looking for an alternative to Vanced, there are several options available such as NewPipe, OGYouTube, YouTube Go, YouTube Music, FireTube, YMusic, and FreeTube. These apps offer similar features such as ad-blocking, background playback, and the ability to download videos in various formats and resolutions. You don't necessarily need MicroG to use these alternative apps.