This means to be put on trial and judged. Alternate translation: "You will be put on trial before" or "You will be brought to trial and judged by" (See: [[rc://en/ta/man/translate/figs-idiom]])
This means they will testify about Jesus. This can be made clear. Alternate translation: "and testify to them about me" or "and you will tell them about me" (See: [[rc://en/ta/man/translate/figs-explicit]])