Google officially ended support for Android 4.4.3 years ago. If you try to open the stock YouTube app on that device today, you will likely be greeted by a cruel "Unfortunately, YouTube has stopped" message or an endless loading spinner.
If you are looking for , you likely have an older TV box or Smart TV running Android KitKat . Modern official apps often drop support for these older versions, but independent developers like yuliskov have maintained versions specifically for older hardware. Why Choose Smart YouTube TV? smart youtube tv apk android 4.4.3 free download
: Offers a customized client optimized for large screens and standard remote controls. Account Sync Google officially ended support for Android 4