The word "didn't" is not a pronoun.
The word "didn't" is a contraction, a shortened form of the verb "did" and the adverb "not".
Example:
Ms. Jones did not like the idea.
Ms. Jones didn't like the idea.
A pronoun is a word that takes the place of a noun in a sentence. Example: Ms. Jones didn't like the idea. She said "no". (the pronoun 'she' takes the place of the noun 'Ms. Jones' in the second sentence)
The word "Which" is a pronoun. However, depending on how it is used it in a sentence the word can vary between being an interrogative pronoun or a relative pronoun.
PREPOSITION
The word 'this' is not a noun.The word 'this' is a pronoun, an adjective, and an adverb.Examples:This is mother's favorite movie. (demonstrative pronoun)This movie is mother's favorite. (adjective)I love you this much! (adverb)
Yourself is a pronoun as it replaces your name.
Adjectives ask these questions: which one, what kind, how many, how much, whose.
'than' is not a pronoun.
Interrogative pronoun
The pronoun 'them' is the third person, plural, objective, personal pronoun.
It is not a pronoun it is a common noun.
"Of" is not a pronoun. He, she, it, they, them, are all pronouns. "Of" is a preposition.
It's called a reflexive pronoun.
The word 'or' is not a pronoun; or is a conjunction, a preposition, or a noun.
Video is not a pronoun, it is a common noun.
Whoever is a subjective pronoun.
The pronouns in the sentence are what (an interrogative pronoun) and you (a personal pronoun).
The kind of noun or pronoun that corresponds with myself is a reflexive pronoun. The personal pronoun that would be used in this case is 'I'. In reflexive form you would say 'myself'.
The two pronouns in the sentence are "your" and "he."