grammaticality - Is this compound sentence grammatically correct?

So, I’ve stumbled upon this really long sentence, and now I’m wondering if it is grammatically correct.

So they figured since I’m a real person and I’m in the movie and I’m actually me and they wanted to use me as me in the actual movie and I didn’t even know yet that I was me in the movie although I did know I was me but I didn’t know I was in the movie, they had better let me know that I was in the movie as me and let me see if after I knew I was me playing me in the movie that I would be okay with being me in the movie as myself now that I knew there was actually a movie with me in it.¹

(I’ve counted 19 simple sentences.)