Jesus is talking to a group of people about what they as individuals should or should not do. The instances of "you" and "your" are all singular, but in some languages they may need to be plural.
Jesus uses this question to rebuke the people for paying attention to other people's sins and ignoring their own. AT: "You look ... brother's eye, but you do not notice the log that is in your own eye." or "Do not look ... brother's eye and ignore the log that is in your own eye." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This is a metaphor for a person's most important faults. A log could not literally go into a person's eye. Jesus is exaggerating to emphasize that a person should pay attention to his own more important faults before he deals with another person's less important faults. (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-hyperbole]])
Jesus asks this question to challenge the people to pay attention to their own sins before they pay attention to another person's sins. AT: "You should not say ... your own eye." (See: [[rc://en/ta/man/translate/figs-rquestion]])