Watching the video is passive. Reading subtitles while the video is muted is active. Many high-scoring students use the subtitles in the following way:
Shrink your text by about 30% more than you think you should. Place it near the focal point of the video—like near a person's mouth or an object being discussed—rather than the "safe zone" at the bottom. Sketchy Micro Subtitles
This forces the brain to process the information actively by reading while simultaneously looking at the visual symbols on the screen. Watching the video is passive