What title can be used in opposition of "Diseases of Attitude"?

How about upsides or benefits or advantages? From Lexico:

upside: The positive or favorable aspect of something.

benefit: An advantage or profit gained from something.

advantage: A favorable or desirable circumstance or feature; a benefit.

Your "diseases of attitude" focuses on the negative aspects of attitude. Upsides of attitude, benefits of attitude, advantages of attitude do the opposite.

If you want to be more alliterative (it sounds more like "diseases"), how about Successes of Attitude? Plus I think more apt for the video in question, which gives a laundry list of attitudes to avoid (indifference, pessimism, etc.).

I would suggest : Wellments of Attitude

as a wordplay on "ailments".

Given as the purpose of the lecture is to highlight several "dispositions of the mind" ( indifference, indecision, doubt, overcaution, complaining ), so to speak, to which the mind of most individuals falls prey, preventing them from self-fulfilment, it seems only right to me that wellness should be opposed to the illness of being impaired from such diseases.

You may object, though, that it is customary that "the stems to which -ment is normally appended are those of verbs" - to quote Henry Watson Fowler.