A possible concise summary is:
The video is a Portuguese language lesson about pronoun placement. The teacher explains the rules and examples of prosthesis, mesoclisis and enclisis, which are the three possible positions of the oblique pronouns in relation to the verb. She also gives some excerpts from Dom Casmurro by Machado de Assis to practice the correct placement of the pronouns. She invites the viewers to comment their answers and follow her on social media.
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1. The text is a transcript of a video lesson about pronoun placement in Portuguese.
2. The lesson explains the three positions of the oblique pronouns: proclisis, mesoclisis and enclisis, and the rules for each one.
3. The lesson uses examples from Dom Casmurro by Machado de Assis, a famous Brazilian writer.
4. The lesson also mentions some cases where the rules of pronoun placement may sound unnatural or outdated in modern Portuguese.
5. The lesson ends with an invitation to comment, subscribe and follow the channel on other social networks.