On iOS devices including iPhone, iPod Touch, and an iPad tablet, you can enable and customize the subtitles from the Videos app. The app features in iOS by default in the respective iOS devices you are using to watch the videos. Open the Videos app and you can find the subtitles from Audio & Subtitles menu. Tap on the screen while watching the video to reveal the playback controls and tap on the speed bubble icon to open Audio & Subtitles menu.
Choose the Subtitles option and the subtitle file embedded to the movies or foreign language videos will be in sync with the video you are watching on an iOS device. In addition to that, you also have the option to tweak the style of the subtitle to better suit your movie watching needs on the compatible iOS devices as mentioned below.
Customizing the Options
Navigate to Settings > General > Accessibility > Subtitles & Captioning > Style and then you can choose a predefined style which can be default, large text or classic. Alternatively, you can choose Create New Style and tweak the font, size, color of the subtitle text appearing in the Videos app of the refurbished iPad alongside color and opacity of the background.
Once you are done tweaking the settings, open the video to full screen by tapping the full-screen icon and then you can examine whether the new style is suitable to view the subtitle in a way that won’t get in the way of watching the movie on the Videos app.
To ensure that the customized style will be used for all videos that you may watch on the iOS device, disable the Video Override toggle at the bottom of each custom option’s screen on the app. If you are satisfied with the changes you made regarding the appearance of subtitle, tap on Save at the top of the app, and from then on, the new style will be default for subtitles and captions.
If you want Videos to use the same features by default, for the “deaf and hard of hearing” as Apple puts it forth, navigate to Settings > General > Accessibility. Then, scroll through to the Media section, tap on Subtitles & Captioning, and enable the toggle for Closed Captions + SDH on your iPad tablet.