YouTube testing 'Auto speed' and motion-activated YouTube Music-like controls

YouTube is testing two Android-only Premium experiments.

They include an automatic playback speed feature called Auto speed and an On-the-go mode that switches to a YouTube Music-style UI when motion is detected.

Both features are limited, not on by default, and available for testing through April 27.

If released, they could change how Premium subscribers control playback and view videos on mobile.