There are a number of great reasons to caption online video.
It creates a great web video experience for the deaf or hard of hearing. Whether you are creating video for entertainment, education, or marketing, why would you want to alienate a part of your potential audience.
Your captioning files can be translated and used to reach audiences around the globe.
Adding transcripts to your videos helps with search engine optimization and discoverability of your work, as the content is more easily indexed by search engines.
It’s a requirement for broadcasters. The FCC recently ruled that existing closed captioning requirements for IP delivered video content will be extended to include individual video clips or segments extracted from shows.