YouTube "レオナルドディカプリオで英会話を学ぼう"

     I listened to this YouTube. I like YouTube like this and often watch. In this YouTube, Rupa sensei who is a owner of this channel showed the part of the movie and we can learn what the actor said or what grammar are used. Also, I think the listening ability is improved. YouTube that I watched today is the part of "The Great Gatsby". I could learn this phrase, "to pop in(into) ~" means "to go somewhere". In the movie, Leonardo DiCaprio said "I just have to pop into town", but this phrase was so fast. Especially, "I just have to". According to Rupa sensei, this phrase is sound like "I-jus-hafta". Also, I heard the pronunciation "pop into" is sound like "pop-inta". I felt it is difficult to understand the movie that is only used in English, but I'd like to watch some foreign movies that had watched before in Japanese.