Most people scroll quickly on their phones, so the first few seconds matter more than anything else. Videos that start with something interesting or surprising make people stop and watch instead of scrolling past. Keeping videos short also helps because most viewers will not sit through something long on a small screen. Adding captions is smart too since many people watch without sound, especially in public places. The best mobile videos feel natural and do not look too polished or scripted because that makes them easier to connect with. What do you think makes someone actually finish watching a video instead of skipping it halfway?