Using a browser keeps you safer because you aren't installing outdated, unpatched APKs.
is widely cited as the final version that supports Android 6.0 and 7.0 before the client was disabled. Current Status : Even if you install a legacy APK, you may encounter a or be forced to use the website. How to Install a YouTube APK on Android 6.0.1 youtube apk android 6.0.1