Desinstalar programas

Hola.
Soy completamente nuevo en el uso del ambiente Linux.
Necesito saber cómo desinstalar programas, porque baje algunos similares a los que ya están y el WhatsApp no reproduce videos.
Gracias

You can deinstall Applications similar like you install them in the App Center. For almost every application installed, there’s a Uninstall Button in the App Center:

Please note, that you can’t uninstall some applications as they are part of the Operating System itself.