Unfortunately, I am not as proficient in English to understand everything from this video.

However, I'll try to answer your question with a joke.

When a student of the third course of medical university was learning medicine, he found out that he was suffering from each of diseases, except for pregnancy.

As for the DSM, I know that the distinction psychiatrists make is that while many people may have mild symptoms of some recognized disorders, it is the severity and the extent to which the symptoms control your life that is the focus.  

For instance, many people in the USA use the acronym 'OCD' casually these days - "I'm a little OCD about that."  There is a big difference between preferring your desk to be organized and not being able to leave the room until all of the books have been stacked from large to small.

I agree with you Bruce in that it is difficult to even know which terms to use.  Unfortunately, these words are used pejoratively too often.

Thaddeus:

  I don't think one can diagnose one's self that way.

 It is a proverbialism in the USA, that  what distinguishes a "crazy" person from others is that a person

 who is "crazy"  never considers this as a possibility.   A more reasonable person  will always consider the possibility that something is wrong with them.

 Also, one of the difficulties with modern Psychiatry and Psychology, is that they to not actually define

for us a standard that could be identified objectively as "normal" or "healthy".  There are,  in this regard,  only diagnoses  for abnormalities.  (I guess that is the appropriate or sufficient term to use.)

    I am thinking at the moment of a person I am familiar with who is almost continually "angry".  I think it reasonable to say that people who qualify for some kind of a diagnosis,  do so because they are driven by either anger, depression,   or fear,  rather than by a feeling of acceptance of others.  I would propose that generally,  people who do not qualify for a diagnosis are those who have learned to resolve  anger, depression,  and fear within themselves, by acknowledging and resolving it in some way.

   Of course,  we live in a world in which anti-depssant  drugs are very much a norm.

For myself,  I do not  medicate myself in this way and never have.  I do  think  there are  many people in the population in the USA  who are  using some kind of Anti-Depressant drug.  So, in that regard, it will suffice to say that many people suffer from some kind of diagnosis for "depression".  Generally speaking, I feel  serene and calm most of the time.

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I read somewhere something like keti's words. University students majoring in psychology tends to analyze how their parents raised them wrong. Of course it's only a joke.