The answer to your question is “no”. It’s not enough to make a diagnosis. I think your letter is an example of how a little information can do a lot of harm. You stumbled on a video that had enough truth in it that you got upset and started to second guess yourself. You may have found something useful. But it’s also possible that you are over-thinking.
Here’s the difficulty with diagnosing a “personality disorder”. All of the traits are common to almost everyone – at least some of the time. They are variables in people’s personalities.
Someone is diagnosed as having a personality disorder when a group of traits become so patterned and rigid that the result is an unhealthy pattern of thinking and functioning and feeling. People with a personality disorder have difficulty in all areas of life, including social relationships, work, and academics. Usually they don’t experience themselves as having a problem because, to them, what they think and feel seem natural. None the less, the difficulties show up in patterns of failure in friendships, romance, and accomplishments.
You may have a personality disorder. Or you may be over-worried that you do. The way to settle the question is to make an appointment with someone who is qualified to make a diagnosis, not Dr. Google. Get a good assessment. If you do have a disorder, you will be given suggestions for treatment. If you don’t, you’ll have the peace of mind that comes with knowing.
I wish you well.