This expression is incredibly common in everyday speech and appears frequently in Spanish TV shows and movies. In fact, you will often hear it in conversational dialogues like this one from an italki lesson:
Why does El Tonto remain so central? Three cultural reasons:
Don't try to understand 100% of a show. If you understand 80%, keep watching. If you only understand 20%, it is too advanced for now. Put it on your "watch later" list and find something simpler.