The Veritasium video talks about research and how the evidence doesn't support the learning styles theory. On the other hand, psychology theory into personality

The Veritasium video talks about research and how the evidence doesn't support the learning styles theory. On the other hand, psychology theory into personality has a lot of evidence to show that people vary a lot on their extraversion. The reported results (from Big Five and similar personality tests) are usually in percentiles relative to some reference population rather than a label of introvert or extrovert.