Boot into recovery, wipe your cache partition, and try the installation steps again. Long live Marshmallow.
Realistically, by late 2026, even the legacy APKs will begin to fail. Google is slowly migrating its API endpoints to HTTP/3 and QUIC protocols, which Android 6.0.1 cannot handle. youtube apk android 6.0 1
Download YouTube APK version 17.36.37 . It is the last "stable" version that treats Android 6.0.1 as a first-class citizen. It supports 720p and 1080p video playback smoothly and does not have the memory leaks found in the 18.x branches. Boot into recovery, wipe your cache partition, and