Read the full text of Henry VI Part 3 Act 4 Scene 5 with a side-by-side translation HERE.
Richard, Hastings, and Sir William Stanley gather in the woods. Richard's sent word to his brother Edward to hunt in a certain place.
Sure, Edward's been captured, but he's still allowed to hunt sometimes.
Richard and his buddies get the huntsman to release Edward so that he can join their team. Since they plan to chop off the huntsman's head if he doesn't do as they say, he doesn't really have many solid options.