Interrupt, then explain
Pattern interruption is a change in sound, framing, or the sentence they expected. An open loop is a question you do not answer yet. A visual hook is the frame itself: a result, a mistake, a face reacting. A verbal hook is the line. You need at least one. The videos that die usually open with a logo, a "hey guys," or a slow zoom onto a desk.
Curiosity and tension are not the same as lying. "This setting ruined my stream" works if the next sentence shows the setting. "You will not believe this" with nothing behind it trains people to swipe you next time.