Brazilian Portuguese uses many accents (e.g., ê, á, ç ). If you see weird symbols (like ж or ╔ ), your media player's encoding is likely wrong.
For a smoother experience, you can use tools that find and sync subtitles automatically: Last Looks Legendas Portuguese (BR)
A massive global database where you can search for "Last Looks" and filter by "Portuguese (BR)". Brazilian Portuguese uses many accents (e