Open the built-in browser on your Android 4.4.4 device. Go to www.apkmirror.com . Do not click on Google ads; navigate directly to the search bar.
Open the app. It will ask you to sign into your Google account. Note: You may see a "Google Play Services is out of date" error. Ensure your MicroG or Google Play Services is updated to at least version 21. If not, you may need to use YouTube in a browser or via an alternative client (see below). Youtube Android 4.4 4 Download Apk