When choosing a camera for autofocus video, look for features such as fast and accurate autofocus, face and eye detection, continuous autofocus during video recording, and the ability to adjust autofocus sensitivity and speed.

Mirrorless cameras generally offer better autofocus performance for video due to their advanced sensor-based autofocus systems. They often provide faster and more accurate focusing, especially with face and eye detection capabilities.

Lens compatibility is crucial for achieving optimal autofocus performance. Ensure that the camera body you choose is compatible with lenses that have fast and silent autofocus motors, which are essential for smooth and noise-free focusing during video recording.

Yes, many third-party lenses offer excellent autofocus performance for video. However, it's important to check compatibility with your camera body and read reviews to ensure that the lens provides reliable and smooth autofocus during video recording.

Not all cameras offer continuous autofocus during video recording. It's important to check the specifications of the camera to ensure it supports this feature, as it allows the camera to maintain focus on moving subjects without manual intervention.