What is the Liveit - Android application, how does it work?

According to the introduction of PCTECK-SERVIÇOS, Liveit - Android is a Entertainment app on the Android platform. There is currently a 1.6.6 version released on Apr 09, 2020, you can see the details below.

É uma pequena aplicação gerada e feita a partir da ideia de vários colaboradores. Com vista a melhor o desempenho e funcionalidades que por outros não conseguem.
Aproveitem e usem e abusem.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.