I can hear the word being said very quickly. I'm a British native English speaker and this TV show is American English, but we are very used to understanding American accents due to the far-reach of US TV and movies.
When certain words are spoken really, really quickly, it is arguable whether native speakers actually 'hear' them at all, but we may not need to. It is a widely-accepted scientific fact that the human brain 'compensates' for missing information, such as omitted words. Maybe you've seen internet memes which invite you to read something, and then read it again more closely - only on second inspection do you notice that words or letters are omitted. I would imagine that this probably only happens when receiving languages you are familiar with.
I would ask you though - can you understand what was said without the word "anybody"? It is common in colloquial speech to drop words like this. If he'd just said to his friends "wanna play?" it would have been quite commonly understood, as much as "anybody wanna play?" If your answer is 'yes', you could understand the gist of what was said, then congratulations, you've understood it as much as any native speaker probably would.