There's a high rate of comorbidity between NPD and BPD as well as a lot of overlap since they're both cluster B personality disorders.
With the "What BPD Has Done To My Life" title though, I don't think he's talking about himself. He uses a lot of misleading clickbait titles, especially for his drama videos to stir controversy (on top of just a general lack of understanding of the English language). In this instance, I presume he's more than likely intending to stir shit by calling the people he's mad at (like Sarah) BPD and dragging them/airing their dirty laundry. Basically "BPD has ruined my life because all my ex's had it and are psycho reeee"
With the "What BPD Has Done To My Life" title though, I don't think he's talking about himself. He uses a lot of misleading clickbait titles, especially for his drama videos to stir controversy (on top of just a general lack of understanding of the English language). In this instance, I presume he's more than likely intending to stir shit by calling the people he's mad at (like Sarah) BPD and dragging them/airing their dirty laundry. Basically "BPD has ruined my life because all my ex's had it and are psycho reeee"