Because video is made of moving pictures, instead of still ones, it is is more engaging and interesting to watch. When movies were first invented, people flocked to cinema houses to see the amazing moving pictures. Even today, viewers are far more likely to watch a video on their computer or television than look at pictures or read text. Why? Because it's more fun.
Remember the saying, 'a picture is worth a thousand words'? Well, video can display up to 30 frames per second, or 30 still images, in one second. You can demonstrate products, interview your most satisfied clients, or deliver a personal and heartfelt mission statement, all using the medium of HD video. None of this can be accomplished to the same effect using traditional web media such as pictures and text.
Research has shown that the more senses are involved in an experience, the more likely a person is to remember more about that experience. While pictures and text only engage the eye of the viewer, video with sound engages both the eyes and ears, making your message more memorable.
Statistical studies have shown that website visitors are more likely to watch a video than read a page of text or look at pictures. Because watching a video is a passive activity, compared with the active chore of reading a page of text, more of your viewers are likely to sit through even a remotely interesting video, rather than read a page of text about the benefits of your product or service.
To a person who is visually impaired, most websites are useless without the assistance of special page reading technology. Even with this technology, many sites are difficult for those with visual impairments to read and navigate. A video with a suitable voice-over can be almost as informative to a person with a visual impairment as it is to someone with perfect eyesight. And through the use of on-screen captions, those with hearing impairments can get just as much out of your video too.