Because VidMate is not available on the due to Google’s policies against YouTube downloaders, you must perform a manual "sideload" installation using an APK file. 1. Enable Unknown Sources
Since you aren't using the Play Store, you must allow your phone to install apps from other sources.
Since VidMate is distributed as an APK (Android Package Kit), the installation process requires a few manual steps on Android devices.
remains a workhorse. Follow this guide carefully, and you will be downloading HD videos in under 5 minutes.