Because the official app is often broken on older devices, community-developed alternatives are generally more reliable for Android 4.4.2. How do you get YouTube on Android 4.4? : r/oldyoutubelayout

How to Install Youtube on old phones and tablets, Android 4.4.2 23 May 2024 —

Often, the YouTube app won't run unless Google Play Services is also updated to its final compatible version for KitKat. Better Alternatives

Downloading APKs manually bypasses Google Play Protect’s real-time scanning for that specific installation. Here is how to stay safe:

Google Play Services Error: YouTube relies heavily on Google Play Services. If your Play Services version is too old, YouTube won't sign in. You may need to manually find and install a KitKat-compatible version of Google Play Services APK as well.