Always scan APK files for malware before installing.
However, it is not for everyone. If you are uncomfortable with sideloading, using unofficial software, or tinkering with settings, stick with the official app or subscribe to YouTube Premium. smart youtube tv 6.17 245
During our test, the QR code login worked. However, user reports indicate that Google is actively blocking new logins on this version. If you are already signed in, you are fine. If you do a factory reset tomorrow? You might be locked out. Always scan APK files for malware before installing