Don't only rely on visuals or sound
Whenever you publish a video, you should make it accessible for any users who have visual or audio difficulties. This means that you should provide alternative ways of giving those users your content and not only rely on image or sound.
If you're using images or animations, think about someone with a visual impairment and if they need a description of what's being shown. Also think about if they can understand the video with just the imagery and subtitles/transcript.
Provide a transcript or subtitles
It's good practice to provide a transcript of your video or add subtitles (ideally both). The transcript should be easily accessible from the video (links in video descriptions or on pages that have embedded videos). You can add subtitles to your video once you've edited the final version. For iPhone or Mac users, you can use an app called Clips which can generate subtitles from speaking into the app. And if you're uploading your video to YouTube, you can easily add subtitles and closed captions.
Frame your shots for subtitles
Finally, think about how you frame your shots. Try and leave enough room at the bottom of your shot so that you can add subtitles later. If you're filming an interview or a vox pop, make sure that your interviewee's face won't be covered by subtitles.
If you work in Parliament and you'd like help with filming, get in touch with the Content Team.